Colorectal Cancer Screening Guidelines Research Articles

Abstract A126: Cancer screening trends in Louisiana’s sexual gender minority population

Abstract Cancer screenings in Louisiana (LA) have been consistently lower than the national average. Sexual and gender minorities (SGM) are more likely to be non-compliant with cancer screening guidelines and consistently do not meet cancer screening recommendations. This study compares compliance to cervical, breast, and colorectal cancer (CRC) screening guidelines over time between SGM and the non-SGM population in LA. Data were obtained from the LA 2014, 2016, 2018, 2020, and 2022 Behavioral Risk Factor Surveillance System (BRFSS). The sample was divided into gay (including lesbian, gay, bisexual, or other sexual orientation other than straight) and straight. Three primary outcomes of interest were used to measure breast, cervical, and CRC cancer screening adherence based on the U.S. Preventive Services Task Force (USPSTF) screening recommendation at the time of each survey. Descriptive analysis and chi-square tests were conducted using sample weights. CRC had the lowest compliance rate in the entire population and across sexual orientation groups. Twenty-five percent of both populations had never received any CRC screening test. Comparatively, 3.6% of straight and 5.3% of gay populations had never received a mammogram while 6.6% of straight and 13.6% of the population had never received a pap smear. Significant improvements in compliance to breast, cervical, and CRC cancer screenings guidelines was observed among those who identified as straight over the survey years until 2020. Decreases in screening compliance were observed in this population from 2020 to 2022, likely due to the effects of the COVID pandemic. Screening compliance in those who identified as gay showed more variation over time in all three cancers. Screening compliance for CRC and cervical cancer were at its highest in 2016, declined to its lowest point in 2020, but increased in 2022. In 2016, there was a significant decline in breast cancer screening compliance in this population to the lowest ever observed in both groups. The initial increases in colorectal and cervical cancer screening observed from 2014 to 2016 among the gay population may be attributed to significant decreases in uninsured rates following the passage of the Affordable Care Act. Additionally, this population saw increased access to the private insurance market following the Obergefell decision and the Marriage Equality Act of 2015, which extended employer-sponsored coverage to same-sex couples. While breast cancer screenings declined from 2014-2016 in the gay population, there was a sharp increase from 2016 to 2018, which aligns with the 2016 expansion of Medicaid in Louisiana. Despite increases in access to insurance coverage, SGM individuals report being in fair or poor health and having negative experiences with healthcare providers at higher rates than their non-SGM counterparts. More research is needed to understand the healthcare landscape and experiences of SGM Louisianans. This will help to inform targeted interventions to increase screenings and improve cancer outcomes among this population. Citation Format: Bilikisu Elewonibi, Carleigh Baudoin, Ashely Fenton. Cancer screening trends in Louisiana’s sexual gender minority population [abstract]. In: Proceedings of the 17th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2024 Sep 21-24; Los Angeles, CA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2024;33(9 Suppl):Abstract nr A126.

Factors affecting treatment decisions for endoscopically resected low- and high-risk malignant colorectal polyps in a screening setting

IntroductionThe European Guidelines for colorectal cancer screening of 2006 state that only high-risk endoscopically resected malignant colorectal polyps (MCPs), defined as poor/no differentiation or positive resection margins or lymphovascular invasion, require colonic resection. MethodsA multicentre series of 954 patients with screen-detected MCP (northern Italy, 2005–2016, age 50–69) was studied to identify (1) the factors affecting the choice of colonic resection, and (2) the factors associated with deviation from the European Guidelines for low- and high-risk patients. Data analysis was based on multilevel logistic regression models. ResultsFive hundred sixty-four (59.1 %) patients underwent colonic resection. The factors significantly associated with surgical referral included: distal and rectal versus proximal tumour site (inverse association); sessile and flat versus pedunculated morphology (direct association); tumour size (direct); moderate/poor versus good differentiation (direct); adenocarcinoma of not otherwise specified type versus adenocarcinoma with a residual adenoma component (direct); positive versus negative resection margins (direct); lymphovascular invasion (direct); and high-grade versus low-grade/absent tumour budding (direct). In low-risk MCPs, tumour budding encouraged strongly the decision for surgery. In high-risk MCPs, a distal/rectal tumour site encouraged the follow-up option. ConclusionThe identification of factors associated with treatment choices other than those currently recommended may help prioritise the clinical questions in the development of future guidelines.

Factors Affecting Colorectal Cancer Screening in Primary Care Physician Practices in Ukraine.

This study aims to identify the factors influencing colorectal cancer (CRC) screening practices, along with the barriers and facilitators from the perspective of primary care physicians (PCPs) in Ukraine. Considering health care system challenges, including those posed by the ongoing war, this research seeks to inform improvements in CRC screening and outcomes in Ukraine and other low- and middle-income countries (LMICs). A survey was designed and distributed electronically to Ukrainian PCPs, focusing on CRC screening practices, beliefs, and barriers. The survey incorporated questions adapted from established cancer screening surveys and frameworks. Complete responses were collected from 740 PCPs. Sample statistics were computed, and population-level perceptions and associations with CRC screening practices were estimated by standardizing responses to national PCP demographics. The majority of respondents were women (91%) and specialized in family medicine (84%). Respondents believed in the effectiveness of colonoscopy for reducing CRC mortality (80%), with 75% of PCPs referring patients for this screening modality. Major barriers identified include inadequate training of PCPs in screening and lack of resources. Respondents reported high utilization of fecal occult blood test and colonoscopy for screening when these tests were said to be available in their practices. Self-reported familiarity with CRC screening guidelines and participation in educational workshops were positively associated with screening referrals. The study highlights the role of access to CRC screening tests and awareness of screening guidelines in enhancing CRC screening practices among Ukrainian PCPs. Addressing training and resource barriers, alongside public health interventions targeting patient-related barriers, is essential. These findings offer valuable insights for LMICs facing similar challenges, emphasizing the need for tailored strategies to improve cancer screening in these health care settings.

Investigation of Iranian Family Physicians’ Knowledge Toward Colorectal Cancer Screening, Risk Factors, and Sings and Symptoms

Background: Colorectal cancer (CRC) is the second leading cause of cancer-related deaths with high mortality rates worldwide. Accessible screening methods have facilitated its early diagnosis. In Iran, as in many Asian countries, an important barrier to CRC screening is the insufficient knowledge of healthcare providers, including physicians, and the lack of advice from them. Available data on this subject are insufficient, and more surveys are needed in this country. Objectives: This study aimed to investigate Iranian physicians' knowledge about CRC signs and symptoms, risk factors, and screening. Additionally, the association between their knowledge and their characteristics was assessed to provide more data for further interventions. Methods: This cross-sectional study was conducted on 150 family physicians selected by convenience sampling from rural areas in Hamadan province, Iran, from June to September 2017. A self-administered, semi-structured questionnaire was used. Data were analyzed using SPSS 21, with a significance level set at P < 0.05. Results: The mean total knowledge score about CRC was 25.11 ± 4.64 (64.3%) out of 38 questions. The average scores for knowledge about CRC signs and symptoms, risk factors, and the screening program were 7.1 ± 0.81 (out of 8), 10.29 ± 1.83 (out of 13), and 7.77 ± 3.43 (out of 18), respectively. Family physicians had the highest accuracy in answering questions about CRC signs and symptoms (88.7%) and the lowest accuracy in answering questions about the screening program (43%). Since the Kolmogorov-Smirnov test rejected the normal distribution of the data, nonparametric tests were used to compare physicians' knowledge scores according to different variables. The study revealed a statistically significant reverse correlation between physicians’ knowledge of CRC and their age (r = -0.342, P < 0.001), years since graduation (r = -0.228, P = 0.005), and work experience (r = -0.247, P = 0.002). However, after multiple regression analysis, only higher age significantly predicted lower total knowledge scores (P = 0.002). No significant relationship was found between participants' knowledge scores and their gender (P = 0.929) or place of employment (P = 0.399). Conclusions: Family doctors had insufficient knowledge regarding CRC screening programs. To address this issue, health education programs should be designed to enhance their knowledge of CRC screening guidelines.

Long-term effects of once-only flexible sigmoidoscopy screening on colorectal cancer incidence and mortality: 21-year follow-up of the UK Flexible Sigmoidoscopy Screening randomised controlled trial

Flexible sigmoidoscopy screening reduces colorectal cancer incidence and mortality; however, uncertainty exists about the duration of protection and differences by sex and age. We assessed effects of once-only flexible sigmoidoscopy screening after 21 years' follow-up. The UK Flexible Sigmoidoscopy Screening Trial is a multicentre randomised controlled trial that recruited men and women aged 55-64 years from general practices serving 14 hospitals. Among participants indicating that they would attend flexible sigmoidoscopy screening if invited, randomisation (2:1) to the control (no further contact) or intervention (invited to once-only flexible sigmoidoscopy screening) group was performed centrally in blocks of 12, stratified by centre, general practice, and household type. Masking of intervention was infeasible. Primary outcomes were colorectal cancer incidence and mortality. The Kaplan-Meier method estimated cumulative incidence. Primary analyses estimated intention-to-treat hazard ratios (HRs) and risk differences, overall and stratified by subsite, sex, and age. The trial is registered with ISRCTN, number 28352761. Among participants recruited between Nov 14, 1994, and March 30, 1999, 170 432 were eligible and 113 195 were randomly assigned to the control group and 57 237 were randomly assigned to the intervention group. 406 participants were excluded from analyses (268 in the control group and 138 in the intervention group), leaving 112 927 participants in the control group (55 336 [49%] men and 57 591 [51%] women) and 57 099 in the intervention group (27 966 [49%] men and 29 103 [51%] women). Of participants who were invited to be screened, 40 624 (71%) attended screening. Median follow-up was 21·3 years (IQR 18·0-22·2). In the invited-to-screening group, colorectal cancer incidence was reduced compared with the control group (1631 vs 4201 cases; cumulative incidence at 21 years was 3·18% [95% CI 3·03 to 3·34] vs 4·16% [4·04 to 4·29]; HR 0·76 [95% CI 0·72 to 0·81]) with 47 fewer cases per 100 000 person-years (95% CI -56 to -37). Colorectal cancer mortality was also reduced in the invited-to-screening group compared with the control group (502 vs 1329 deaths; cumulative incidence at 21 years was 0·97% [0·88 to 1·06] vs 1·33% [1·26 to 1·40]; HR 0·75 [0·67 to 0·83]) with 16 fewer deaths per 100 000 person-years (-21 to -11). Effects were particularly evident in the distal colorectum (726 incident cancer cases in the invited-to-screening group vs 2434 cases in the control group; HR 0·59 [0·54 to 0·64]; 47 fewer cases per 100 000 person-years [-54 to -41]; 196 cancer deaths in the invited-to-screening group vs 708 deaths in the control group; HR 0·55 [0·47 to 0·64]; 15 fewer deaths per 100 000 person-years [-19 to -12]) and not the proximal colon (871 incident cancer cases in the invited-to-screening group vs 1749 cases in the control group; HR 0·98 [0·91 to 1·07]; one fewer case per 100 000 person-years [-8 to 5]; 277 cancer deaths in the invited-to-screening group vs 547 deaths in the control group; HR 1·00 [0·86 to 1·15]; zero fewer deaths per 100 000 person-years [-4 to 4]). The HR for colorectal cancer incidence was lower in men (0·70 [0·65-0·76]) than women (0·86 [0·79 to 0·93]; pinteraction=0·0007) but there was no difference by age. We show that once-only flexible sigmoidoscopy screening reduces colorectal cancer incidence and mortality for two decades and provide important data to inform colorectal cancer screening guidelines. National Institute for Health and Care Research Health Technology Assessment Programme and the Medical Research Council.

Rising trend of early-onset colorectal cancer in the US: Incidence and projections to 2030.

e15523 Background: Colorectal cancer (CRC) remains a critical health issue in the United States, particularly notable for its rising incidence in individuals under 55 years. Factors such as lifestyle habits, and genetic predispositions may contribute to pathogenesis while inadequate screening protocols may lead to delayed diagnoses in this younger demographic. Currently, the initial CRC screening guidelines recommend lowering the start age to 45. We seek to provide current data on the US CRC incidence and estimate the burden by 2030. Methods: Using the CDC National Center of Health Statistics database, we queried the incidence rates of CRC from 1999 to 2020. These are reported in Crude rate and age-adjusted rates to standard year 2000 populations per 100,000 person-years. The Autoregressive Integrated Moving Average model was used to predict the projected incidence rate by 2030. R software version 2023.09 was used for analysis. Results: The study identified 3,201,843 CRC cases from 1999-2020, with a notable increase in incidence rates, especially in younger demographics. The largest increase was in the 30-34 age group, with an AAPC of 2.76, followed by the 25-29 and 35-39 age groups, with AAPCs of 2.57 and 2.24, respectively. In contrast, older age groups showed a decline, with the 75-79 age group decreasing from 9.20 to 3.76, and an AAPC of -4.05%. By 2030, early-onset colorectal cancer is expected to rise, particularly in the 40-44 age group (AAPC of 3.26%) and the 35-39 age group (AAPC of 2.92%). The increase is projected mainly in the 25-54 age groups. Conversely, older populations, particularly the 75-79 age group, are projected to see a decrease in incidence rates, from 3.76 to 1.17 per 100,000 by 2030. Conclusions: Our study highlights a significant rise in early-onset CRC, especially in the 25-54 age group, with an increasing projection by 2030 while older age groups are expected to experience a decrease in incidence rates. Consideration should be given to expanding CRC screening in patients younger than 45. [Table: see text]

Cost effectiveness of colorectal cancer screening in the Dominican Republic.

e23033 Background: Colorectal cancer (CRC) incidence in the Dominican Republic (DR) is increasing, and CRC now ranks as the third-most prevalent cancer in the DR. There are no national CRC screening guidelines in the DR, and CRC screening is not routinely performed. We evaluated the impact of nationwide CRC screening by comparing the cost-effectiveness of four CRC screening strategies to the current practice of no screening. Methods: We developed a Markov model comparing four CRC screening strategies to the current practice of no screening, or natural history (NH): colonoscopy every ten years (Colo); sigmoidoscopy every five years (Sig); fecal immunochemical test biennially (FIT); and fecal occult blood test biennially (FOBT). Model inputs for screening arms were derived from international randomized controlled trials whenever possible. Data from The Rosa Emilia Sánchez Pérez de Tavares National Cancer Institute in the DR was used to estimate baseline CRC incidence, stage distribution and mortality. Screening was implemented from age 45 to 75. We assumed a 60.6% adherence rate for each screening arm. The model was cross validated by comparing the estimated lifetime impact of each screening arm on CRC incidence and mortality to estimates derived from the MIcrosimulation SCreening Analysis (MISCAN) Colorectal Cancer Model in the US. The primary outcome was the incremental cost-effectiveness ratio (ICER) of each screening strategy. Secondary outcomes included life expectancy, total cost, CRC incidence and CRC-related mortality. The willingness to pay threshold (WTP) was set to the 2022 DR gross domestic product per person ($10,111.20/life year gained). Results: In the NH strategy, 2.3% of the population developed CRC, and 1.2% died from CRC, with a lifetime cost of 203.47 per person. Compared to NH, FIT prevented 27% of CRCs and 37% of CRC deaths, with a lifetime cost of 244.76 per person. Colo was more effective than FIT, preventing 33% and 43% of CRC cases and deaths, respectively, compared to NH. However, the ICER for Colo exceeded the WTP threshold. One-way sensitivity analyses showed that the model is most sensitive to test performance characteristics and test costs. Conclusions: Among the evaluated CRC screening strategies, FIT is the cost-effective option, averting a significant number of CRC cases and deaths, at an incremental cost that is well within the WTP threshold for the DR. Inclusion of local data on the effectiveness and acceptability of the tested CRC screening modalities would improve this model, and strengthen the credibility of our findings. [Table: see text]

Is annual screening by fecal immunochemical test necessary after a recent colonoscopy?

The population-based colorectal cancer screening guidelines in Japan recommend an annual fecal immunochemical test (FIT). However, there is no consensus on the need for annual FIT screening for patients who recently performed a total colonoscopy (TCS). Therefore, we evaluated the repeated TCS results for patients with positive FIT after a recent TCS to assess the necessity of an annual FIT. We reviewed patients with positive FIT in opportunistic screening from April 2017 to March 2022. The patients were divided into two groups: those who had undergone TCS within the previous 5 years (previous TCS group) and those who had not (non-previous TCS group). We compared the detection rates of advanced neoplasia and colorectal cancer between the two groups. Of 671 patients, 151 had received TCS within 5 years and 520 had not. The detection rates of advanced neoplasia in the previous TCS and non-previous TCS groups were 4.6% and 12.1%, respectively (p < 0.01), and the colorectal cancer detection rates were 0.7% and 1.5%, respectively (no significant difference). The adenoma detection rates were 33.8% in the previous TCS group and 40.0% in the non-previous TCS group (no significant difference). Only a few patients were diagnosed with advanced neoplasia among the patients with FIT positive after a recent TCS. For patients with adenomatous lesions on previous TCS, repeated TCS should be performed according to the surveillance program without an annual FIT. The need for an annual FIT for patients without adenomatous lesions on previous TCS should be prospectively assessed in the future.

Effectiveness of fecal DNA syndecan-2 methylation testing for detection of colorectal cancer in a high-risk Chinese population.

Colorectal cancer (CRC) is among the most prevalent and life-threatening malignancies worldwide. Syndecan-2 methylation (mSDC2) testing has emerged as a widely used biomarker for early detection of CRC in stool and serum samples. Cancer (CRC) is among the most prevalent and life-threatening malignancies worldwide. mSDC2 testing has emerged as a widely used biomarker for early detection of CRC in stool and serum samples. To validate the effectiveness of fecal DNA mSDC2 testing in the detection of CRC among a high-risk Chinese population to provide evidence-based data for the development of diagnostic and/or screening guidelines for CRC in China. A high-risk Chinese cohort consisting of 1130 individuals aged 40-79 years was selected for evaluation via fecal mSDC2 testing. Sensitivity and specificity for CRC, advanced adenoma (AA) and advanced colorectal neoplasia (ACN) were determined. High-risk factors for the incidence of colorectal lesions were determined and a logistic regression model was constructed to reflect the efficacy of the test. A total of 1035 high-risk individuals were included in this study according to established criteria. Among them, 16 suffered from CRC (1.55%), 65 from AA (6.28%) and 189 from non-AAs (18.26%); 150 patients were diagnosed with polyps (14.49%). Diagnoses were established based upon colonoscopic and pathological examinations. Sensitivities of the mSDC2 test for CRC and AA were 87.50% and 40.00%, respectively; specificities were 95.61% for other groups. Positive predictive values of the mSDC2 test for CRC, AA and ACN were 16.09%, 29.89% and 45.98%, respectively; the negative predictive value for CRC was 99.79%. After adjusting for other high-risk covariates, mSDC2 test positivity was found to be a significant risk factor for the occurrence of ACN (P < 0.001). Our findings confirmed that offering fecal mSDC2 testing and colonoscopy in combination for CRC screening is effective for earlier detection of malignant colorectal lesions in a high-risk Chinese population.

Colorectal cancer information avoidance is associated with screening adherence.

Colorectal cancer (CRC) is the fourth most common cancer among U.S. men and women and the second deadliest. Effective screening modalities can either prevent CRC or find it earlier, but fewer than two thirds of U.S. adults are adherent to CRC screening guidelines. We tested whether people who defensively avoid CRC information have lower adherence to CRC screening recommendations and weaker intentions for being screened and whether CRC information avoidance adds predictive ability beyond known determinants of screening. Participants, aged 45-75 years, completed a survey about known structural determinants of CRC screening (healthcare coverage, healthcare use, provider recommendation), CRC information avoidance tendencies, and screening behavior (n = 887) and intentions (n = 425). Models were tested with multivariable regression and structural equation modeling (SEM). To the extent that participants avoided CRC information, they had lower odds of being adherent to CRC screening guidelines (OR = 0.55) and if non-adherent, less likely to intend to be screened (b=-0.50). In the SEM model, avoidance was negatively associated with each known structural determinant of screening and with lower screening adherence (ps < 0.01). Fit was significantly worse for nested SEM models when avoidance was not included, (i.e., the paths to avoidance were fixed to zero). Information avoidance was associated with screening behavior and other known structural determinants of screening adherence, potentially compounding its influence. Novel strategies are needed to reach avoiders, including health communication messaging that disrupts avoidance and interventions external to the healthcare system, with which avoiders are less engaged.

Exploring Gender Disparities in Factors Influencing Colorectal Cancer Screening Compliance in Singapore.

The uptake of colorectal cancer (CRC) screening remains suboptimal in Singapore. Existing research highlights gender-related disparities in screening behaviors. This study aims to evaluate the gender differences in factors associated with CRC screening compliance in Singapore, with a specific focus on cancer screening beliefs and knowledge on CRC screening guidelines. Data were collected from an online survey on cancer screening belief, knowledge, and practices in Singapore. Multivariate logistic regression analysis was conducted to identify independent factors associated with compliance in CRC screening. The study included 633 participants aged 50-69 years, eligible for CRC screening. Only 132 participants (20.9%) complied with CRC screening guidelines with no significant gender differences observed in compliance rates. Most participants held positive beliefs on routine screening (86.9%) and perceived screening benefits in improving treatment outcomes (89.6%) and reducing mortality rates (77.6%). However, both genders exhibited limited knowledge regarding CRC screening guidelines. Only 28.3% were aware that CRC screening should commence at age 50 years. While nearly half of participants knew FIT (44.7%) and colonoscopy (52.0%) as CRC screening modalities, only 27.5% and 15.2% recognized the recommended intervals for FIT and colonoscopy screening respectively. Multivariate analysis revealed a positive association between knowledge on CRC screening guidelines and CRC screening compliance for both genders. Gender-specific variations were observed in the factors associated with CRC screening compliance. Specifically, women with a family history of cancer, believing in routine cancer screening, and prior adherence to breast cancer screening and men within the older cohort (55-69 years) were more likely to comply with CRC screening. Low compliance with CRC screening was observed in Singapore. Targeted interventions should address gender-specific factors and highlight CRC screening guidelines as a crucial component of cancer education for entire screening eligible population in order to improve CRC screening compliance.

Improving Concordance Between Clinicians With Australian Guidelines for Bowel Cancer Prevention Using a Digital Application: Randomized Controlled Crossover Study.

Australia's bowel cancer prevention guidelines, following a recent revision, are among the most complex in the world. Detailed decision tables outline screening or surveillance recommendations for 230 case scenarios alongside cessation recommendations for older patients. While these guidelines can help better allocate limited colonoscopy resources, their increasing complexity may limit their adoption and potential benefits. Therefore, tools to support clinicians in navigating these guidelines could be essential for national bowel cancer prevention efforts. Digital applications (DAs) represent a potentially inexpensive and scalable solution but are yet to be tested for this purpose. This study aims to assess whether a DA could increase clinician adherence to Australia's new colorectal cancer screening and surveillance guidelines and determine whether improved usability correlates with greater conformance to guidelines. As part of a randomized controlled crossover study, we created a clinical vignette quiz to evaluate the efficacy of a DA in comparison with the standard resource (SR) for making screening and surveillance decisions. Briefings were provided to study participants, which were tailored to their level of familiarity with the guidelines. We measured the adherence of clinicians according to their number of guideline-concordant responses to the scenarios in the quiz using either the DA or the SR. The maximum score was 18, with higher scores indicating improved adherence. We also tested the DA's usability using the System Usability Scale. Of 117 participants, 80 were included in the final analysis. Using the SR, the adherence of participants was rated a median (IQR) score of 10 (7.75-13) out of 18. The participants' adherence improved by 40% (relative risk 1.4, P<.001) when using the DA, reaching a median (IQR) score of 14 (12-17) out of 18. The DA was rated highly for usability with a median (IQR) score of 90 (72.5-95) and ranked in the 96th percentile of systems. There was a moderate correlation between the usability of the DA and better adherence (rs=0.4; P<.001). No differences between the adherence of specialists and nonspecialists were found, either with the SR (10 vs 9; P=.47) or with the DA (13 vs 15; P=.24). There was no significant association between participants who were less adherent with the DA (n=17) and their age (P=.06), experience with decision support tools (P=.51), or academic involvement with a university (P=.39). DAs can significantly improve the adoption of complex Australian bowel cancer prevention guidelines. As screening and surveillance guidelines become increasingly complex and personalized, these tools will be crucial to help clinicians accurately determine the most appropriate recommendations for their patients. Additional research to understand why some practitioners perform worse with DAs is required. Further improvements in application usability may optimize guideline concordance further.

Colorectal Cancer Prevention: Is Chat Generative Pretrained Transformer (Chat GPT) ready to Assist Physicians in Determining Appropriate Screening and Surveillance Recommendations?

To determine whether a publicly available advanced language model could help determine appropriate colorectal cancer (CRC) screening and surveillance recommendations. Poor physician knowledge or inability to accurately recall recommendations might affect adherence to CRC screening guidelines. Adoption of newer technologies can help improve the delivery of such preventive care services. An assessment with 10 multiple choice questions, including 5 CRC screening and 5 CRC surveillance clinical vignettes, was inputted into chat generative pretrained transformer (ChatGPT) 3.5 in 4 separate sessions. Responses were recorded and screened for accuracy to determine the reliability of this tool. The mean number of correct answers was then compared against a control group of gastroenterologists and colorectal surgeons answering the same questions with and without the help of a previously validated CRC screening mobile app. The average overall performance of ChatGPT was 45%. The mean number of correct answers was 2.75 (95% CI: 2.26-3.24), 1.75 (95% CI: 1.26-2.24), and 4.5 (95% CI: 3.93-5.07) for screening, surveillance, and total questions, respectively. ChatGPT showed inconsistency and gave a different answer in 4 questions among the different sessions. A total of 238 physicians also responded to the assessment; 123 (51.7%) without and 115 (48.3%) with the mobile app. The mean number of total correct answers of ChatGPT was significantly lower than those of physicians without [5.62 (95% CI: 5.32-5.92)] and with the mobile app [7.71 (95% CI: 7.39-8.03); P < 0.001]. Large language models developed with artificial intelligence require further refinements to serve as reliable assistants in clinical practice.

Colonoscopy screening for colorectal cancer in Egypt: a nationwide cross-sectional study

BackgroundCurrent guidelines advocate for colorectal cancer (CRC) screening in adults who are at risk by using direct visualization methods such as colonoscopy. However, in Egypt, there is a paucity of data regarding the current practice of colonoscopy screening. Moreover, more information is needed about the knowledge and attitudes of potential participants regarding the procedure and possible barriers that can limit their participation.MethodsWe conducted a nationwide cross-sectional study using an interview-based survey of patients aged 45 years or above who presented to outpatient clinics of nine university hospitals throughout Egypt. Participants were surveyed to assess their compliance with CRC colonoscopy screening guidelines, their knowledge of and attitude towards colonoscopy screening, and their perspective on potential barriers to colonoscopy screening.ResultsA total of 1,453 participants responded to our survey in the nine study centers. Only a minority of participants (2.3%) were referred for CRC screening. Referral rates were higher among those who knew someone with a history of CRC (5.3% vs 1.5%, p < 0.001) or had a discussion with their physician about CRC (25.8% vs 0.7%, p < 0.001). Few responders (3.2%) had good knowledge regarding CRC screening. After introducing the concept of CRC screening to all participants, most patients (66.7%) showed a positive attitude towards having the procedure. Financial burden and fear of results were the two most frequently cited barriers to undergoing CRC screening (81.1%; and 60.1%, respecteively).ConclusionsDespite the positive attitude, there is insufficient knowledge about CRC screening among eligible participants in Egypt. This has probably contributed to low compliance with current CRC screening guidelines and needs to be addressed at the national level.

Impact of revising colorectal cancer screening guidelines on health care resources in Canada.

78 Background: The rising incidence of early-onset colorectal cancer (CRC) has prompted U.S. organizations to lower the recommended CRC screening age for average risk adults from 50 to 45 years old, while Canadian programs remain unchanged. Canadian guidelines also differ from the U.S. in preferentially screening with a fecal immunochemical test (FIT) and recommending against colonoscopies as a screening test. Differences in national healthcare administration warrants investigation into the resource impact of updating screening guidance in Canada. Methods: Microsimulation modeling was performed using OncoSim (version 3.6) to project health and economic outcomes of different CRC screening strategies based on Canadian population data. Four simulated birth cohorts of the Canadian population born between 1973–1992 were tracked for a 40-year span from the year the oldest in each cohort turned 40 until the youngest in the same cohort turned 75. Colorectal adenoma rates were adjusted according to cohort risk ratios estimated from historical incidence data to reflect real-world CRC rates. Outcomes were reported for the cumulative cohort. Results: Compared to FIT screening at age 50, FIT screening at 45 reduced deaths by 5,220, incidence by 11,980, and added 96,100 health-adjusted life years (HALY). Colonoscopy screening at age 45 led to 17,870 fewer deaths, 74,250 fewer cases and added 314,960 HALYs. FIT and colonoscopy screening at age 45 had incremental costs of CAD$3,259 and $7,881 per HALY gained vs. a FIT at age 50, respectively. Across screening strategies, the greatest benefits were observed in the youngest cohort. Colonoscopy screening at age 45 resulted in 10,679,540 more total colonoscopies than the current capacity of 8,966,979 with FIT screening at age 50. Lowering the screening age to 45 with a FIT increased colonoscopy demand by 329,555. The total cost of CRC care (screening, diagnosis and treatment) increased with lower screening ages and colonoscopy first modalities, while the cost of CRC management (diagnosis and treatment) decreased with lower screening ages and colonoscopy first approaches. Conclusions: Adjusting current CRC screening guidelines demonstrates significant resource implications with proportional health benefits. Lower screening ages and colonoscopy first approaches have the largest resource demand and greatest health outcomes, while the incremental cost per HALY gained for all screening strategies is modest compared to standard benchmarks. [Table: see text]

A nudge strategy to increase the uptake of colorectal cancer screening in Saudi Arabia: A pragmatic randomized trial in the Hail region.

The purpose of this research was to examine the effectiveness of using a nudge strategy to encourage eligible clients to participate in colorectal cancer screening (CRCS) at primary care facilities. Additionally, it emphasizes the good outcomes of utilizing nudge in primary healthcare settings by reflecting on the novel experience of family physicians and nurses in the field of CRCS. Nudge is a cost-effective intervention that serves as a choice architect to assist people in making wise decisions for their lives. It is a subtly changed environment or combination of words that push individuals to make a decision without restricting their alternatives. This is a six-month, pragmatic trial with open-label recruitment that enrolled people with an average CRC risk from four screening healthcare zones that included 34 public primary care facilities. The study protocol is registered and can be accessed here: https://clinicaltrials.gov/ct2/show/NCT05785975. An obvious increase in the proportion of the uptake of CRCS screening is higher in the two intervention sites-Al Hait General Hospital Zone (38%) and Al-Shamli General Hospital Zone (26%), than in the two control sites, Bagaa General Hospital Zone (18%) and King Khalid Hospital Zone (18%). Using the nudge strategy to increase CRCS uptake is valuable and effective; additionally, front-line family physicians and nurses in primary care are encouraged to use a planned, positive, and highly selective set of words when offering screening. Policymakers could make use of these research outcomes when designing new guidelines for CRCS.

Abstract A040: Examining the geographical distribution of a colorectal cancer awareness community outreach program

Abstract Background: Colorectal cancer (CRC) is a significant health issue in the United States, ranking as the third most diagnosed cancer and the second leading cause of cancer-related deaths. The incidence of CRC varies across the east coast of the United States due to multiple factors, including disparities in lifestyle, healthcare accessibility, and environmental exposures. Community-based participatory research plays a vital role in identifying effective interventions to enhance awareness of cancer risk and prevention in specific communities. Methods: This study focused on Asian Americans, Blacks, and Hispanics residing in the Greater Philadelphia (PA), New Jersey (NJ), and New York City (NYC) areas. The Synergistic Partnership for Enhancing Equity in Cancer Health (SPEECH) collaborated with community-based organizations' leaders and staff to streamline recruitment, workshop delivery, and survey data collection. The workshop curriculum covered essential CRC information, including facts, dietary habits, and screening guidelines. Pre- and post-workshop surveys were used to assess changes in CRC knowledge and screening intention. The distribution of participants was analyzed using Arc GIS. Results: [GXM1] The study population consisted of 212 Asian, 172 Hispanic/Latino, and 126 African American/Black participants. Geographical data was obtainable for 486 participants, primarily from New York (n=286, 58.8%), Pennsylvania (n=150, 30.9%), and New Jersey (n=49, 10.1%). These states form the Pennsylvania, New Jersey, and New York City (PNN) region, which is known for its high concentrations of neighborhoods experiencing persistent poverty, especially in areas densely populated by minorities. Distinct examples include neighborhoods within the Bronx borough of New York City and Philadelphia County in Pennsylvania. Alarmingly, in some counties within the PNN region, as many as 26% of the census tracts are categorized as persistently impoverished. This pattern of concentrated poverty is supported by several existing studies and research reports. Conclusions: The distribution of participants aligned with the study area of SPEECH and areas characterized by persistent poverty. These findings provide valuable insights to guide efforts in improving cancer health equity in the identified regions. Citation Format: Thoin F. Begum, Ellen Kim, Lin Zhu, Yin Tan, Evelyn T. González, Marilyn A. Fraser, Yingzhang Lin, Nathaly Rubio-Torio, Tenya Blackwell, Carolyn Martin, Safa Ibrahim, Ming-Chin Yeh, Grace X. Ma. Examining the geographical distribution of a colorectal cancer awareness community outreach program [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 A040.

Value of fecal immunochemical test in colorectal cancer screening

Screening and early diagnosis and treatment have been proven effective in reducing the incidence and mortality of colorectal cancer. Colonoscopy combined with pathological examination is the gold standard for colorectal cancer screening. However, due to the invasiveness, high cost and the need for professional endoscopists of colonoscopy, it is not feasible to directly use this method for mass population screening. Fecal immunochemical test (FIT) is one of the screening techniques recommended by authoritative international guidelines for colorectal cancer screening, and has been widely used in population-based colorectal cancer screening programs in countries around the world. This paper elaborates on the value of FIT in colorectal cancer screening from different aspects, such as the technical principles, the screening efficiency, the screening strategies, and the population effects and benefits. Additionally, it describes the current situation of colorectal cancer screening in China and summarizes the challenges faced in colorectal cancer screening in order to optimize the FIT-based colorectal cancer screening strategies in the population and provide theoretical reference for effective colorectal cancer screening.

Government Housing Assistance and Cancer Screening Among Adults With Low Income

Access to affordable housing may support cancer control for adults with low income by alleviating financial barriers to preventive care. This study examines relationships between cancer screening and receipt of government housing assistance among adults with low income. Data are from the 2019 and 2021 National Health Interview Survey. Eligible respondents were classified as up-to-date or not with breast cancer (BC), cervical cancer (CVC) and colorectal cancer (CRC) screening guidelines. Multivariable logistic regression was used to model guideline-concordant screening by receipt of government housing assistance, overall and stratified by urban-rural status, race/ethnicity, and age. Analyses were performed in 2023. Analyses for BC, CVC and CRC screening included 2,258, 3,132, and 3,233 respondents, respectively. There was no difference in CVC screening by housing assistance status, but screening for BC and CRC was higher among those who received assistance compared to those who did not (59.7% vs. 50.8%, p<0.01 for BC; 57.1% vs. 44.1%, p<0.01 for CRC). In models adjusted for sociodemographic characteristics, health status and insurance, these differences were not statistically significant for either BC or CRC screening. In stratified adjusted models, housing assistance was statistically significantly associated with increased BC screening in urban areas (aOR=1.35, 95% CI=1.00-1.82) and among Hispanic women (aOR=2.20, 95% CI=1.01-4.78) and women 45-54 years of age (aOR=2.10, 95% CI=1.17-3.75). Policies that address housing affordability may enhance access to BC screening for some subgroups, including women in urban areas, Hispanic women, and younger women. More research on the mechanisms that link housing assistance to BC screening is needed.

Cancer Screening Prevalence and Preference among Hospitalized Women With and Without Obesity.

This study explored the prevalence of nonadherence and preferences for breast cancer (BRC) and colorectal cancer (CRC) screening among hospitalized women with and without obesity who were cancer-free at baseline. In addition, the study evaluated risk factors associated with nonadherence among hospitalized women with obesity. A prospective interventional study evaluated nonadherence prevalence and preference for cancer screening among hospitalized women aged 50 to 75 years. The intervention consisted of one-to-one bedside education via handouts about cancer screening. In addition, multivariable logistic regression models assessed associations between sociodemographic and clinical comorbidity variables believed to influence screening adherence among hospitalized women. Six months after discharge from the hospital, study participants received a follow-up telephone survey to determine adherence to BRC/CRC screening guidelines. Of 510 enrolled women, 61% were obese (body mass index ≥30 kg/m2). Women with and without obesity were equally nonadherent to BRC (34% vs 32%, P = 0.56) and CRC (26% vs 28%, P = 0.71) screening guidelines. Almost half of the study population preferred undergoing indicated BRC/CRC screening in the hospital regardless of obesity status. After adjustment for sociodemographic and clinical risk factors, not having a primary care physician (odds ratio [OR] 5.88, 95% confidence interval [CI] 2.20-15.7) and nonadherence to CRC screening (OR 3.65, 95% CI 1.94-6.54) were associated with nonadherence to BRC screening among women with obesity. After similar adjustment, having an education less than high school level (OR 2.55, 95% CI 1.21-5.39) and nonadherence to BRC screening (OR 3.64, 95% CI 1.97-6.75) were associated with nonadherence to CRC among women with obesity. Women with obesity are at risk of being underscreened for obesity-related malignancies, and hospitalizations may offer screening opportunities for BRC and CRC.