Perfect Adherence Research Articles

Supporting risk management through cyberspace: An adaptive network model simulating AI coach effects by inducing adherence to guidelines in neonatal medical protocols

In this article, it is shown how second-order adaptive agent-based network models can be used to support a medical team in healthcare institutions to adhere to specific Neonatal Hypoglycemia and Neonatal Hyperbilirubinemia treatment guidelines through the integration of an Artificial Intelligence (AI) Virtual Coach. The proposed AI Coach is designed to provide timely interventions and correct deviations when lapses in the health care practitioner’s internal mental model occur. Through simulating three different scenarios, the internal dynamics of these mental models, adaptive changes of these mental models (learning and forgetting), and the interaction between health care practitioners and the world is shown when: (1) There is perfect adherence to guidelines, (2) There is imperfect adherence to guidelines and (3) There is both perfect and imperfect adherence to guidelines alongside interventions of the AI Coach in the latter case.

Adherence to cardiovascular medications and risk of cardiovascular disease in breast cancer patients: A causal inference approach in the Pathways Heart Study

Purpose Women with breast cancer (BC) are at high risk of developing cardiovascular disease (CVD). We examined adherence to CVD medications and their association with major CVD events over 14 years of follow-up in the Pathways Heart Study, a prospective study of 4,776 stage I-III BC patients diagnosed from 2005–2013. Methods Eligibility included being alive 6 months post-BC diagnosis, with dyslipidemia, hypertension, or diabetes at diagnosis along with ≥1 prior outpatient order or dispensing for a statin, anti-hypertensive, or diabetes medication, respectively, in the 30 months prior. Medication adherence was measured from pharmacy data to calculate cumulative average adherence (CAA). Incident heart failure (HF), ischemic heart disease (IHD), and stroke were determined via validated diagnosis and procedure codes. Working marginal structural models (MSM) fitted with inverse probability weighting evaluated the effect of adherence regimens on the hazards for each CVD event, while controlling for baseline and time-varying confounders. MSM parameterizations included: 1) CAA<100% versus CAA = 100% (ref), 2) CAA<80% versus CAA≥80% (ref) and 3) CAA<80% versus 80%≤CAA<100% versus CAA = 100%. Results Poor statin adherence (CAA<80%) was associated with higher risk of composite CVD (HR = 2.54; 95% CI: 1.09, 5.94) versus CAA≥80%. Poor statin adherence was also associated with a higher risk of stroke (HR = 8.13; 95% CI: 2.03, 32.51) but not risk of IHD and HF. Further, compared with perfect adherence (CAA = 100%), good adherence (80%≤CAA<100%) was associated with lower risk (HR = 0.35; 95% CI: 0.13, 0.92) while poor adherence (CAA<80%) was associated with higher risk of composite CVD (HR = 2.45; 95% CI: 1.05, 5.70). Levels of adherence to anti-hypertensives and diabetes medications had mixed or null associations with risk of CVD. Conclusions Maintaining good adherence (≥80%) to statins after BC treatment is beneficial for cardiovascular health in patients with dyslipidemia. Future studies should determine factors associated with lower adherence to statins and ways to improve adherence.

A Prospective and Observational Study on the Impact of Patient Counselling on Medication Adherence and Quality of Life in Stroke Patients

PURPOSE: The study goals are to improve medication adherence and high-quality lifestyles in stroke patients through effective patient counselling. BACKGROUND: Stroke is one of the most common neurological disorders and the second most common purpose of dying worldwide. Stroke is likewise called cerebral infarction or cerebrovascular twist of fate. It occurs when blood flow to the brain is reduced due to permanent or temporary blockage of an artery that carries blood to the brain, or rupture of an artery in the brain because of high blood pressure The primary danger elements of Stroke encountered are high blood pressure, age, diabetes mellitus, obesity, smoking, and alcohol. the burden of stroke is gigantic and recurrence of stroke is a first-rate risk issue for growing the weight of stroke. medications play an crucial position in stopping stroke recurrence. Adherence can be summarized as ‘The extent to which someone’s behaviour taking medicinal drug, following a diet, and/or executing life-style modifications – corresponds with agreed tips from a health care provider”. current estimates are that only one-sixth of all sufferers come close to perfect adherence to their medicine regimen. the issue is gaining importance because of an increase in the prevalence of chronic diseases and an ageing population. common reasons of medicine nonadherence include complicated remedy regimens and patients’ lack of belief within the treatment. Healthcare specialists play an crucial position in remedy adherence amongst stroke survivors. They should deal with the boundaries and facilitate remedy adherence behaviours. METHODOLOGY: It is a prospective observational study conducted in Lalitha Super specialities Hospital, Guntur over 6 months duration study in the neurology department, a total of 200 patients of age groups between 25-85 of both genders with comorbidities like hypertension, diabetes, and affected with stroke were enrolled in the study. RESULTS & DISCUSSIONS: The outcomes were obtained after 6 months duration observe within the neurology branch of tertiary care hospital a total of 200 patients enrolled in the study. The study of the effect of patient counselling on medication adherence and quality of life in stroke patients is a prospective observational take a look at in which facts is amassed in Lalitha super speciality hospital with a random representative sampling method explaining the qualitative & quantitative evaluation. We accrued 200 instances of these tormented by ischemic, hemorrhagic, and transient ischemic stroke, and affected person counselling was given and followed up after discharge. Out of 2 hundred samples, 67% of patients are suffering from ischemic stroke, 22.5% from hemorrhagic & 10.5% from TIA. males (60.5%) are greater stricken by stroke than females (39.5%) and the age group between 46-55 is more affected by stroke (32%). The patients who are with both hypertension and diabetes were extra affected by stroke (45.5%) than the ones having single co-morbidities, high blood pressure (28%) and DM (13.5%). in the collected samples males are more effecting by hypertension (33.88%) and females with diabetes (15.18%) and both high blood pressure & diabetes (49.36%). medication adherence in stroke patients is the primary goal of the observe, figure no 5 indicates that out of 200 sufferers, 129 (sixty four.5%) have highly adhered to medicine, 61 patients (30.5%) are mild, and, 10 patients (5.0%) low adherence to remedy after counselling to the patients. quality of lifestyles is the main objective of this study. figure no 6 suggests the quality of life of 200 stroke patients earlier than and after patient counselling. The exceptional of lifestyles had been measured using a modified ranking SCALE (mRS). After the 6-month observe up the quality of life had improved in patients. A quantitative analysis was done using the chi-square test the end result of x squared value is 35.1 with Df 6 at a significance level of 0.05, and the P value is <0.05. CONCLUSION: The main aim of this study is to provide better patient counselling to improve medication adherence and the quality of life in stroke patients was achieved successfully. In this study 200 stroke patients were enrolled and patient counseling was provided and followed up through face-to-face interviews and phone calls. Among 200 patients, 129 patients (64.5%) were highly adherence to the medication and 61 patients (30.50%) were moderately. 10 patients (5%) were low adherence to medication. The quality of life of stroke patients increased after the counselling compared to before counselling. The medication adherence and quality of life were measured using MMAS-8 QUESTIONS and a modified ranking scale (mRS) respectively. It is also evident from the study that pharmacist intervention is effective in improving medication adherence and its associated effect on the management of patients receiving stroke therapy.

Modeling hepatocyte apoptosis in chronic HCV infection with impulsive drug control

Chronic hepatitis C virus (HCV) infection is one of the leading life-threatening diseases owing to its non-cytopathic nature and scarcity of vaccines to combat. Hepatocyte apoptosis casts extensive impact in regulating chronic HCV infection. We propose a four dimensional deterministic model scheming the role of hepatocyte apoptosis and significance of HCV-specific CTL response in the intermediate stages of chronic HCV infection. Numerical simulation indicates that unregulated behavior of hepatocyte apoptosis triggers hepatocellular carcinoma and prolonged continuation of apoptosis induces liver damages. The system undergoes backward bifurcation and the value of the basic reproduction number R0=0.98<1 shows recurrence of infection. Local sensitivity analysis has been performed to reveal the most sensitive parameters responsible for the progression and mitigation of infection. In order to control of chronic HCV infection through pan-genotypic direct acting antiviral drugs (DAAs), impulsive differential equations are considered to study the effect of perfect drug adherence to both fixed and non-fixed dosing. For possible eradication of the chronic HCV infection, impulsive drug control suggests significant viral load reduction. The analytical results obtained for both non-impulsive and impulsive models are quantified biologically.

"I want to be healthy and move on": A qualitative study of barriers and facilitators to antiretroviral treatment adherence among young adult survivors with perinatal HIV in Thailand.

We know that HIV treatment outcome depends on antiretroviral treatment (ART) adherence. Young adults with perinatal HIV (YPHIV) who survived have endured various adherence challenges in their adolescent years. While some of them could maintain perfect adherence with sustainable virologic suppression, many experienced one or more episodes of virologic failure. We explored factors affecting ART adherence from real-life experiences of YPHIV. A qualitative study was conducted between June and November 2022. Twenty YPHIV aged 21-29 years with a history of virologic failure and resumed virologic suppression during adolescent years were invited to share their experiences through individual in-depth interviews. Audio records were transcribed verbatim and analyzed using deductive thematic analysis. We divided excerpts into two themes: barriers and facilitators to ART adherence. The socio-ecological model was used to frame subthemes at personal, societal, and healthcare system levels. Most barriers to adherence were concentrated at the personal level, including work/study-related conditions, personal entertainment, medication issues, mental health problems, thought, and belief. At the societal level, social activities and fear of HIV disclosure were frequently mentioned as barriers. Medical care cost was the only identified barrier at the healthcare system level. The facilitators to adherence at the personal level included perceiving health deterioration, being afraid of hospitalization and medical procedures, and wishing to be healthy and move on. At the same time, perceived family support and determination to complete family without HIV transmission were identified as facilitators at the societal level. Service behaviors of healthcare providers were mentioned as facilitators to adherence at the healthcare system level. From this study, most factors associated with non-adherence in adolescents were at the personal level, and the fear of HIV disclosure was critical at the societal level. The key facilitator to adherence was the determination to be healthy and have a promising future. Our findings reinforce the importance of establishing youth-friendly services in the existing HIV care setting. More time allocation for tailored individual counseling, using other novel approaches like mHealth, online media, and involvement of social support from different sectors might be beneficial to maximize adherence self-efficacy during the transitional period of YPHIV.

Patient-reported barriers for adherence to prophylactic enoxaparin after orthopedic trauma surgery

IntroductionVenous thromboembolism following orthopedic trauma surgery remains prevalent despite prophylaxis being a standard of care. Enoxaparin injection is a commonly utilized prophylaxis regimen among high-risk patients. Patient-reported rates of nonadherence and barriers to enoxaparin use are not described in the literature. A better understanding of these barriers and their impact on adherence to post-discharge prophylaxis regimens may shed light on persistent outcomes gaps. Materials and methodsSemi-structured interviews were administered to adult patients prescribed prophylactic enoxaparin and presenting to orthopedic surgery outpatient clinic at an urban level 1 trauma center for a post-operative appointment following traumatic injury from April to July 2023. Patients self-reported their age, gender, race, and mobility. Inductive thematic analysis with three-reviewer consensus identified common barriers among responses. Adherence rates were calculated by dividing patients’ estimated number of missed doses over total prescribed doses at the point of inquiry. ResultsWe identified 154 eligible patients through chart review, and 50 enrolled and interviewed. Participants had a mean age of 37 years. Of 50 participants, 20 identified as female; 25 identified as Black or African American, 16 as White, 5 as Hispanic, 2 as Asian, and 2 as multiracial. Twenty-one participants were non-ambulatory at time of interview. Mean and median patient-reported adherence were 64.5 % (SD 35.5) and 70.5 % (IQR 33–100) respectively. Five patients reported complete nonadherence, while 17 patients reported perfect adherence. Every participant reporting complete nonadherence identified as Black or African American, as compared to 8 out of 17 reporting perfect adherence. Despite acknowledging a twice-daily prescription, 17 patients reported once-daily rather than twice-daily use. Inductive thematic analysis revealed the following six barriers to prophylaxis adherence (number of participants reporting): Inconvenience (18 patients), Pain (16), Fear (12), Acquisition (7), Bruising (7), and Mechanism (7). Altogether, 40 patients endorsed at least one barrier to adherence. Discussion & conclusionsMost patients face barriers to adherence with post-discharge prophylactic enoxaparin, and the resultant rates of adherence are low. This may contribute to persistent outcomes gaps in the orthopedic trauma population despite prophylaxis standards. Changes in prescribing patterns and patient engagement techniques may improve post-operative thromboembolic outcomes.

Estimated impact and value of blood-based colorectal cancer screening at varied adherence compared with stool-based screening

Objective This analysis estimated the outcomes of triennial blood-based colorectal cancer (CRC) screening at various adherence, including perfect adherence, compared with triennial multi-target stool DNA (mt-sDNA) screening at the reported real-world adherence rate. Methods The validated CRC-AIM model simulated a US cohort of average-risk individuals receiving triennial screening with mt-sDNA or blood-based test from ages 45 to 75 years. Modeled specificity and sensitivity were based on reported data. Adherence was set at a real-world rate of 65.6% for mt-sDNA and at 65.6%, relative 10% incremental increases from 65.6%, or 100% for the blood-based test. Costs of mt-sDNA and the blood-based test were based on prices for clinically available tests ($508.87 and $895, respectively). Value-based pricing was estimated at a willingness-to-pay threshold of $100,000. Results Both tests resulted in life-years gained (LYG), reduced CRC cases, and reduced deaths versus no screening. With adherence for mt-sDNA set at 65.6% and for blood-based test set at 100%, mt-sDNA resulted in 30% more LYG, 52% more averted CRC cases, and 32% more averted CRC deaths. At reported sensitivity and specificity rates, mt-sDNA at 65.6% adherence dominates (is more effective and less costly) the blood-based test at any adherence. There was no price at which triennial screening with the blood-based test at any adherence was cost-effective compared with mt-sDNA at 65.6% adherence. Conclusions Triennial screening with mt-sDNA resulted in better clinical outcomes at a lower cost compared with the modeled blood-based test even at perfect adherence, supporting application of blood-based tests only as a secondary screening option.

Association between trajectories of adherence to endocrine therapy and risk of treated breast cancer recurrence among US nonmetastatic breast cancer survivors.

Endocrine therapy is the mainstay treatment for breast cancer (BC) to reduce BC recurrence risk. During the first year of endocrine therapy use, nearly 30% of BC survivors are nonadherent, which may increase BC recurrence risk. This study is to examine the association between endocrine therapy adherence trajectories and BC recurrence risk in nonmetastatic BC survivors. This retrospective cohort study included Medicare beneficiaries in the United States (US) with incident nonmetastatic BC followed by endocrine therapy initiation in 2010-2019 US Surveillance, Epidemiology, and End Results linked Medicare data. We calculated monthly fill-based proportion of days covered in the first year of endocrine therapy. We applied group-based trajectory models to identify distinct endocrine therapy adherence patterns. After the end of the first-year endocrine therapy trajectory measurement period, we estimated the risk of time to first treated BC recurrence within 4 years using Cox proportional hazards models. We identified 5 trajectories of adherence to endocrine therapy in BC Stages 0-I subgroup (n = 28,042) and in Stages II-III subgroup (n = 7781). A trajectory of discontinuation before 6 months accounted for 7.0% in Stages 0-I and 5.8% in Stages II-III subgroups, and this trajectory was associated with an increased treated BC recurrence risk compared to nearly perfect adherence (Stages 0-I: adjusted hazard [aHR] = 1.84, 95% CI = 1.46-2.33; Stages II-III: aHR = 1.38, 95% CI = 1.07-1.77). Nearly 7% of BC survivors who discontinued before completing 6 months of treatment was associated with an increased treated BC recurrence risk compared to those with nearly perfect adherence among Medicare nonmetastatic BC survivors.

High adherence to intermittent and continuous use of a contraceptive vaginal ring among women in a randomized controlled trial in Kigali, Rwanda.

The introduction of female-initiated drug-delivery methods, including vaginal rings, have proven to be a promising avenue to address sexually transmitted infections and unintended pregnancies, which disproportionally affects women and girls in sub-Saharan Africa. Efficient uptake of existing and new technologies such as vaginal rings requires in depth understanding of product adherence. This remains a major challenge as data on adherence to vaginal rings from African countries is limited. In this study, we explored adherence of contraceptive vaginal ring (NuvaRing®) use in Kigali, Rwanda using a mixed methods approach. We collected quantitative and qualitative data at multiple time points from women participating in a clinical trial exploring the safety and acceptability of either intermittent or continuous use of the NuvaRing®. Various adherence categories were used including monthly and cumulative adherence measurement. The quantitative data were analysed using R and the qualitative data were analysed using a deductive, content-analytical approach based on categories related to the quantitative adherence measures. All data were compared and triangulated. Data from 120 enrolled participants showed that self-reported adherence was high at every study visit in both study groups. At first study visit 80% of the intermittent ring users and 79.7% of the continuous ring users reported perfect adherence (assessed as "the ring was never out"). Reporting of ring expulsions and removals were highest (28.3%) at the beginning of the trial. Self-reported perfect ring adherence increased during the study and reports of ring expulsions and removals declined as familiarity with this contraceptive method increased. The percentage of women with perfect cumulative adherence was non-significantly higher in the intermittent (61.7%) than in the continuous use group (54.3%). The low rate of discrepant adherence data after triangulation (6%) is in line with the perception of the participants as adherent throughout the study. Self-reported adherence in both study groups was high with removals and expulsions being within the expected product range. Comprehensive adherence data triangulation allowed for a deeper understanding of context-driven behaviour that shaped adherence patterns and challenges. Our data categorisation and triangulation approach has shown potential for implementation in future vaginal ring studies aiming to better understand and measure adherence.

Validity and reliability of the Romanian version of the Hill-Bone compliance to high blood pressure therapy scale.

Romania is considered a country with high cardiovascular risk, arterial hypertension and its complications accounting for about 60% of total deaths. The management of high blood pressure often involves a combination of both therapeutic regimens as well as lifestyle changes, to which patients have to be adherent. In order to assess patients adherence to professionals' recommendations, validated tools are needed. The aim of our study was to translate, culturally adapt and validate the Hill-Bone Compliance to High Blood Pressure Therapy Scale into Romanian. The study included 215 participants from Iasi, North-Eastern Romania. The internal consistency of the instrument was measured with Cronbach's alpha coefficient, while the construct validity was determined using exploratory factor analysis and principal component extraction with promax rotation. Sampling adequacy and appropriateness of data for factor analysis was measured using Kaiser-Meyer-Olkin (KMO) statistics and Bartlett's test of sphericity. Our statistical analysis revealed a Cronbach's alpha coefficient of 0.733 (73.3%) and a Kaiser-Meyer-Olkin (KMO) Measure of Sampling Adequacy of 0.697. The chi square test demonstrated that the overall perfect adherence was not significantly associated with the number of medications taken per day variable (p = 0.721). The Romanian version of the Hill-Bone Compliance to High Blood Pressure Therapy Scale demonstrated suitability for its use in evaluating adherence in the intended population.

Linkage Case Management and Posthospitalization Outcomes in People With HIV

Despite the widespread availability of antiretroviral therapy (ART), people with HIV still experience high mortality after hospital admission. To determine whether a linkage case management intervention (named "Daraja" ["bridge" in Kiswahili]) that was designed to address barriers to HIV care engagement could improve posthospital outcomes. Single-blind, individually randomized clinical trial to evaluate the effectiveness of the Daraja intervention. The study was conducted in 20 hospitals in Northwestern Tanzania. Five hundred people with HIV who were either not treated (ART-naive) or had discontinued ART and were hospitalized for any reason were enrolled between March 2019 and February 2022. Participants were randomly assigned 1:1 to receive either the Daraja intervention or enhanced standard care and were followed up for 12 months through March 2023. The Daraja intervention group (n = 250) received up to 5 sessions conducted by a social worker at the hospital, in the home, and in the HIV clinic over a 3-month period. The enhanced standard care group (n = 250) received predischarge HIV counseling and assistance in scheduling an HIV clinic appointment. The primary outcome was all-cause mortality at 12 months after enrollment. Secondary outcomes related to HIV clinic attendance, ART use, and viral load suppression were extracted from HIV medical records. Antiretroviral therapy adherence was self-reported and pharmacy records confirmed perfect adherence. The mean age was 37 (SD, 12) years, 76.8% were female, 35.0% had CD4 cell counts of less than 100/μL, and 80.4% were ART-naive. Intervention fidelity and uptake were high. A total of 85 participants (17.0%) died (43 in the intervention group; 42 in the enhanced standard care group); mortality did not differ by trial group (17.2% with intervention vs 16.8% with standard care; hazard ratio [HR], 1.01; 95% CI, 0.66-1.55; P = .96). The intervention, compared with enhanced standard care, reduced time to HIV clinic linkage (HR, 1.50; 95% CI, 1.24-1.82; P < .001) and ART initiation (HR, 1.56; 95% CI, 1.28-1.89; P < .001). Intervention participants also achieved higher rates of HIV clinic retention (87.4% vs 76.3%; P = .005), ART adherence (81.1% vs 67.6%; P = .002), and HIV viral load suppression (78.6% vs 67.1%; P = .01) at 12 months. The mean cost of the Daraja intervention was about US $22 per participant including startup costs. Among hospitalized people with HIV, a linkage case management intervention did not reduce 12-month mortality outcomes. These findings may help inform decisions about the potential role of linkage case management among hospitalized people with HIV. ClinicalTrials.gov Identifier: NCT03858998.

Would initiating colorectal cancer screening from age of 45 be cost-effective in Germany? An individual-level simulation analysis.

Colorectal cancer (CRC) screening has been shown to be effective and cost-saving. However, the trend of rising incidence of early-onset CRC challenges the current national screening program solely for people ≥50 years in Germany, where extending the screening to those 45-49 years might be justified. This study aims to evaluate the cost-effectiveness of CRC screening strategies starting at 45 years in Germany. DECAS, an individual-level simulation model accounting for both adenoma and serrated pathways of CRC development and validated with German CRC epidemiology and screening effects, was used for the cost-effectiveness analysis. Four CRC screening strategies starting at age 45, including 10-yearly colonoscopy (COL), annual/biennial fecal immunochemical test (FIT), or the combination of the two, were compared with the current screening offer starting at age 50 years in Germany. Three adherence scenarios were considered: perfect adherence, current adherence, and high screening adherence. For each strategy, a cohort of 100,000 individuals with average CRC risk was simulated from age 20 until 90 or death. Outcomes included CRC cases averted, prevented death, quality-adjusted life-years gained (QALYG), and total incremental costs considering both CRC treatment and screening costs. A 3% discount rate was applied and costs were in 2023 Euro. Initiating 10-yearly colonoscopy-only or combined FIT + COL strategies at age 45 resulted in incremental gains of 7-28 QALYs with incremental costs of €28,360-€71,759 per 1,000 individuals, compared to the current strategy. The ICER varied from €1,029 to €9,763 per QALYG, and the additional number needed for colonoscopy ranged from 129 to 885 per 1,000 individuals. Among the alternatives, a three times colonoscopy strategy starting at 45 years of age proves to be the most effective, while the FIT-only strategy was dominated by the currently implemented strategy. The findings remained consistent across probabilistic sensitivity analyses. The cost-effectiveness findings support initiating CRC screening at age 45 with either colonoscopy alone or combined with FIT, demonstrating substantial gains in quality-adjusted life-years with a modest increase in costs. Our findings emphasize the importance of implementing CRC screening 5 years earlier than the current practice to achieve more significant health and economic benefits.

How drug onset rate and duration of action affect drug forgiveness.

Medication nonadherence is one of the largest problems in healthcare today, particularly for patients undergoing long-term pharmacotherapy. To combat nonadherence, it is often recommended to prescribe so-called "forgiving" drugs, which maintain their effect despite lapses in patient adherence. Nevertheless, drug forgiveness is difficult to quantify and compare between different drugs. In this paper, we construct and analyze a stochastic pharmacokinetic/pharmacodynamic (PK/PD) model to quantify and understand drug forgiveness. The model parameterizes a medication merely by an effective rate of onset of effect when the medication is taken (on-rate) and an effective rate of loss of effect when a dose is missed (off-rate). Patient dosing is modeled by a stochastic process that allows for correlations in missed doses. We analyze this "on/off" model and derive explicit formulas that show how treatment efficacy depends on drug parameters and patient adherence. As a case study, we compare the effects of nonadherence on the efficacy of various antihypertensive medications. Our analysis shows how different drugs can have identical efficacies under perfect adherence, but vastly different efficacies for adherence patterns typical of actual patients. We further demonstrate that complex PK/PD models can indeed be parameterized in terms of effective on-rates and off-rates. Finally, we have created an online app to allow pharmacometricians to explore the implications of our model and analysis.

Unannounced phone-based pill counts for monitoring antiretroviral medication adherence in South Africa

Background Unannounced phone-based pill counts (UPC) are an objective measure of medication adherence that may be used in resource limited settings. The current study reports the feasibility and validity of UPC for monitoring antiretroviral therapy (ART) adherence among people living with HIV in South Africa. People living with HIV (N = 434) in an economically impoverished township and receiving ART for at least 3-months completed: two UPC in a one-month period; measures of clinic and medication experiences; and provided blood samples for HIV viral load and CD4 testing. Analyses compared two methods for managing values of over-dosing (> 100%), specifically censoring values to 100% (> 100% = 100%) vs. subtracting over-dosing from two months of perfect adherence (200% - > 100% value). Results Findings showed that two UPC calls were successfully completed with 91% of participants in a one-month period. The average number of call attempts needed to reach participants was 2.4. Results showed that lower UPC adherence was significantly associated with male gender, alcohol use, higher HIV viral loads, lower CD4 cell counts, running out of ART, and intentionally not taking ART. Comparisons of methods for adjusting over-dosing found subtraction yielding a better representation of the data than censoring. Conclusions UPC were demonstrated feasible and valid with patients receiving ART in a resource limited setting and offers a viable method for objectively measuring ART adherence in these settings.

Screening for Colorectal Cancer in Individuals Younger Than 50 Years

What Is the Issue?&#x0D; &#x0D; Incidence of colorectal cancer in individuals younger than 50 years in Canada is rising, despite existing recommendations in Canada advising that colorectal cancer screening be initiated at 50 years.&#x0D; In response to the also increasing incidence of colorectal cancer observed in other jurisdictions, screening for colorectal cancer in individuals of average risk younger than 50 years has been recommended.&#x0D; These factors have prompted reconsideration of current Canadian guidelines regarding the age at which colorectal cancer screening should be initiated.&#x0D; &#x0D; What Did We Do?&#x0D; &#x0D; To inform considerations about the age at which colorectal cancer screening should best be initiated, CADTH identified and summarized studies comparing colorectal cancer screening in individuals of average risk younger than 50 years with either no screening or screening in individuals of average risk aged 50 years and older.&#x0D; An information specialist conducted a search of peer-reviewed and grey literature sources. Recommendations from evidence-based guidelines for screening individuals of average risk younger than 50 years were also sought and summarized.&#x0D; &#x0D; What Did We Find?&#x0D; &#x0D; Data from 1 retrospective cohort study in the US conducted in a large sample across 13 years suggested there is higher incidence of colorectal cancer among individuals between the ages of 45 and 49 years who underwent screening colonoscopy than in those between the ages of 50 and 54 years.&#x0D; Data from a retrospective cohort study conducted in Greece with a limited sample size across 1 year of observation demonstrated no difference in the cumulative incidence of colorectal cancer in individuals of average risk younger than 50 years or 50 years and older.&#x0D; Estimates from 4 modelling studies (1 of which was Canadian) that investigated screening in individuals younger than 50 years indicate that life-years may be gained, colorectal cancer cases and deaths may be reduced, but that numbers of lifetime colonoscopies and complications from screening would likely increase.&#x0D; One economic evaluation conducted in Portugal concluded that there is no cost-utility for colorectal cancer screening in individuals of average risk younger than 50 years at a willingness-to-pay threshold of €39,760, given current estimates of incidence in this age cohort.&#x0D; Seven evidence-based guidelines identified recommend that colorectal cancer screening be initiated in individuals of average risk at age 45 years, whereas 1 guideline recommends against screening in individuals of average risk beginning at 45 years and 1 guideline recommends against screening beginning at age 40 years. Most evidence-based guidelines highlight the lack of empirical evidence describing clinical effectiveness and cost-effectiveness as limitations when developing recommendations.&#x0D; &#x0D; What Does It Mean?&#x0D; &#x0D; Empirical data describing the effectiveness of colorectal cancer screening in individuals of average risk younger than 50 years remain limited, although a preponderance of evidence-based guidelines identified by this review recommend in favour of doing so.&#x0D; Modelled data estimate that colorectal cancer screening in individuals younger than 50 years may produce benefits, although these estimates are vulnerable to model inputs and assumptions (perfect adherence to screening protocols, for instance), and may not adequately account for the potential harms of screening.&#x0D; Additional opportunities for maximizing the benefits of colorectal cancer screening may include targeting increased uptake among disadvantaged and high-risk groups, including those 50 years and older.&#x0D; Broader considerations that address societal benefit and costs — including health equity and implementation — are essential to inform decision-making concerning colorectal cancer screening in individuals of average risk younger than 50 years.&#x0D;

Maintenance And Reliever Therapy (MART) for young people with asthma

Maintenance and reliever therapy (MART) is one device, which serves as both preventer and reliever. In children and young people, the choice is more limited in terms of device and this is called Symbicort MART (SMART). One of the most common modifiable factors for optimal asthma control at any age is adherence to prescribed preventer therapy ( British Thoracic Society(BTS)/Scottish Intercollegiate Guideline Network (SIGN), 2019 ). As young patients grow and take increasing responsibility for their own health, perfect adherence can feel impossible for the developing brain (and with this, the ability to effectively analyse risk). As health professionals, it can be easy to focus on the adherence issue as a failure to organise, and to assume all have the capacity to optimally administer a medication twice daily. What we are increasingly learning through the multiple health inequality and psychosocial workstreams is that there are families who are fundamentally less likely to achieve this, even with additional support from their health team, due to an actual or perceived inability to deal with the modifiable factors highlighted by BTS/SIGN.

Abstract A138: Impact of racial disparities in follow-up colonoscopy for abnormal stool-screening test results on colorectal cancer incidence and mortality: A simulation modeling analysis

Abstract Introduction: The benefits of colorectal cancer (CRC) screening programs for average-risk adults rely on completion of follow-up colonoscopy (FU-Col) after a positive result from either the stool-based fecal immunochemical test (FIT) or multi-target stool DNA (mt-sDNA) test. Existing data demonstrate significantly lower rates of FU-Col for Black Americans than White Americans. However, the contribution of differential FU-Col rates on disparate CRC outcomes among Black and White Americans has not been rigorously evaluated. Methods: We used the CRC-Adenoma Incidence and Mortality (CRC-AIM) model as our analysis platform, with inputs from published literature that report Black adults are approximately 15% less likely to complete FU-Col compared to White adults. CRC-AIM was validated against United Kingdom Flexible Sigmoidoscopy Screening Trial and three National Cancer Institute’s Cancer Intervention and Surveillance Modeling Network (CISNET) CRC models. We simulated screening with annual FIT and triennial mt-sDNA between ages 45 and 75 versus no screening. We considered two scenarios that assumed perfect adherence to FIT/mt-sDNA screening: 1) FU-Col rates for Black adults are 15% lower than those for White adults; 2) Black adults have the same FU-Col rates as White adults. In a secondary analysis, we considered real-world adherence to FIT (43%) and mt-sDNA (66%) and reran these two scenarios. Lifetime outcomes per 1,000 individuals were reported. Results: Assuming perfect adherence to FIT/mt-sDNA screening and 15% lower FU-Col rates, estimated life-year gains (LYG) from annual FIT and triennial mt-sDNA screening strategies compared to no screening was 227 and 239 per 1,000 individuals, respectively. If Black adults had the same FU-Col rates as White adults, the LYG would increase to 243 and 256 for FIT and mt-sDNA screening, respectively, which corresponds to a 7% improvement in LYG. Furthermore, elimination of racial disparities in FU-Col rates would reduce CRC incidence by 8% and 9% for FIT and mt-sDNA screening, respectively and reduce CRC mortality by 10% for both FIT and mt-sDNA screening. Secondary analysis shows that eliminating disparities in FU-Col would lead to 9-11% improvement in LYGs, 5-9% improvement in CRC incidence, and 7-11% improvement in CRC mortality for Black adults considering the real-world adherence to FIT/mt-sDNA screening. Conclusions: Data from this novel simulation modeling study that accounts for differences in FU-Col rates between Black and White Americans suggest that focused efforts to eliminate this gap would improve the anticipated LYG, CRC incidence, and CRC mortality benefits associated with stool-based CRC screening by over 7%, 8%, and 10%, respectively. Further investigation of this under-appreciated contributor to established racial disparities in CRC control may lead to innovative solutions for improving health equity. Citation Format: Oguz Alagoz, A. Mark Fendrick, Vahab Vahdat, Chris Estes, A. Burak Ozbay, Travelle Ellis, Paul J. Limburg, Durado Brooks. Impact of racial disparities in follow-up colonoscopy for abnormal stool-screening test results on colorectal cancer incidence and mortality: A simulation modeling analysis [abstract]. In: Proceedings of the 16th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2023 Sep 29-Oct 2;Orlando, FL. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2023;32(12 Suppl):Abstract nr A138.

Impact of Iron Supplementation in Anemic Voluntary First-Time Blood Donors-Results of a Pilot Trial in Ghana

Introduction : Blood transfusion is a major developmental challenge in sub-Saharan Africa due to chronic inadequacy and shortage of major blood products. In Ghana, deferral of potential blood donors has been identified as a significant challenge. Anemia, accounts for nearly half of ineligible blood donors. The estimated prevalence of anemia is 42.4% in women of reproductive age and 18.8% among peri-urban men ( Spring and Ghana Health service 2016). Thus, a high prevalence of anemia accounting for nearly half of voluntary blood donor deferrals, may contribute to the country's poor availability of safe blood for transfusion. No prior investigation had been carried out in Ghana on whether potential blood donors, deferred due to anemia, would consider donating blood after receiving counselling and appropriate treatment. This study tested the hypothesis that low-dose iron supplementation will increase hemoglobin levels sufficiently among anemic individuals to make them eligible to donate blood. Data from this trial informed the design of a larger randomized control type 1 pragmatic effectiveness implementation hybrid trial. Methods:This was a longitudinal two-arm parallel-group trial (participants aged 18 - 60 years). We compared the hemoglobin levels among those with anemia, iron deficiency (ID) or iron deficiency anemia (IDA) who received iron supplementation to donors without ID or IDA (Control group) in a non-inferiority design(NCT04949165). Anemia, IDA and ID were defined and determined using World Health Organization cut-off values (WHO, 2011). Potential blood donors with hemoglobin values less than 10 g/dl were excluded from the study. Participants in the iron supplementation arm were given low-dose iron (65 mg elemental iron) three times weekly for four months while the control arm received the standard nutritional counselling practice. In-person visits occurred at two, four and six months and included blood draws for full blood count, peripheral blood film smear, malaria rapid test and serum ferritin. The primary outcome was hemoglobin level after four months. A structured questionnaire assessed adherence, nutritional counselling and adverse events every two weeks via phone. Results: Two hundred and twenty-three first-time voluntary blood donors consented and passed pre-screening donation requirements (105 in iron supplementation arm vs. 118 in the control arm). The mean ages were similar between the iron supplementation and control groups (19.7±2.5 vs. 20.1±3.1 years). In both groups, there were more females than males (iron: 75.2%; control: 51.7%). At screening, 43.9% (98/223) had anemia while 3.1% (7/223) had ID. Of those who had anemia, 84.7% (83/98) had ferritin at least 15 g/l while 15.3% (15/98) had IDA. Among controls who donated blood at screening with an interim 1 visit, 42.6% (20/47) of females and 20.9% (9/43) of males were anemic. Only 23.4% (11/47) of females but no male was ID after one blood donation. Among participants assigned to iron supplementation who were anemic at screening, 31.7% (20/63) of females and 28.6% (6/21) of males were no longer anemic at interim visit 1. Among iron participants who were ID at screening 53.3% (8/15) of females and no male (0/2) were iron replete at interim visit 1. Only half of the participants receiving iron supplementation self-reported perfect adherence at the first and second interim visits (end of iron supplementation). A small proportion of participants reported side effects of dark stools and abdominal pain. We did not observe bacterial infections or increased malaria incidence. The mean hemoglobin values decreased over time from baseline to month four in the control group (screening: N=118, 13.4±1.3 g/dl; interim visit 2: N=74, 12.3±1.5 g/dl) and increased in the iron supplementation group (screening: N=105, 11.3±0.9 g/dl; interim visit 2: N=56, 11.4±1.3 g/dl). However, the primary comparison, mean hemoglobin difference between the iron supplementation and control arm at four months, did not meet the threshold to reject the inferiority hypothesis. Conclusion: The prevalence of ID and IDA among voluntary first-time blood donors was lower than previously published estimates. Adherence to low-dose iron supplementation three times a week was poor. Hemoglobin levels in the iron supplementation arm were not close enough to those in the control group after four months of iron supplementation to declare non-inferiority.

Correlation between Usual Source of Care and Medication Adherence in Patients with Hypertension.

Maintaining a usual source of care (USC), which is crucial for primary healthcare, encompasses initial contact, comprehensive services, coordinated care, and ongoing support. However, limited research exists on the relationship between USC and medication adherence in patients with hypertension. This study aimed to investigate the association between USC and medication adherence among patients with hypertension. Data from the 2nd Korea Health Panel Survey 2020 were analyzed. The final sample consisted of 3,318 participants aged 19 years or older diagnosed with hypertension. USC was categorized into three groups: no USC, place only (without a regular doctor), and regular doctor. Medication adherence was assessed using detailed items (dose, frequency, time, no stop) and a 4-point Likert scale. A logistic regression analysis was conducted with control for relevant variables. Compared to the no USC group, the regular doctor group had significantly higher odds ratios (ORs) for overall perfect/high medication adherence rates: 1.70 (95% confidence interval [CI], 1.42-2.03) and 1.59 (95% CI, 1.14-2.20). Similar results were observed for each adherence item, including prefect dose (OR, 2.14; 95% CI, 1.73- 2.63), frequency (OR, 1.87; 95% CI, 1.53-2.28), time (OR, 1.72; 95% CI, 1.43-2.07), and no stop (OR, 1.56; 95% CI, 1.09-2.23)/high frequency (OR, 2.47; 95% CI, 1.21-5.01), time (OR, 2.30; 95% CI, 1.19-4.44). However, the place only group showed no significant differences in medication adherence except for perfect adherence to dose (OR, 1.35; 95% CI, 1.06-1.71). These findings provide evidence supporting the need for healthcare policies that encourage having a regular doctor in South Korea, which has a healthcare system with limited primary care.

Influence of Participant Perceptions of Adherence-Related Interactions with Study/Study Team on Drug Levels: HPTN069 Analysis of Self-Reported Adherence Experiences While on Study

Adherence to HIV pre-exposure prophylaxis (PrEP) study drug is critical for safety, tolerability, and efficacy trials, and may be affected by how adherence is communicated by the study staff to trial participants. Increasingly, clinical trials investigating PrEP are creating and implementing ‘participant-centered’ approaches that discuss potential non-adherence neutrally (without negative judgement) and support efforts to adhere versus insisting on perfect adherence. In the HPTN069/ACTG A5305 study, we evaluated participant experiences of potentially negative adherence-related interactions with study teams using ten items to characterize the frequency of such experiences. We related these individual items and a combined set of seven negative experience items (total negative experience score) to drug concentrations (detectable or consistent with daily-dosing). The exploratory analyses used logistic regression for each experience item on the full sample and disaggregated by sex. Several experiences were related to drug detection and to daily-dosing, although more so for participants identifying as men than women. Total negative experience scores associated with not having detection drug concentrations for the full sample, and remained significant even when controlling for sex, age, and race. Daily dosing was associated with total negative experience score for men in the sample. Additional investigations into adherence-related interactions with study teams that are most problematic or helpful in general and uniquely for men and women are warranted.