Vaccination Rates In Patients Research Articles

Influenza Vaccination Coverage and Influencing Factors in Type 2 Diabetes in Mainland China: A Systematic Review and Meta-Analysis

Background: Influenza has many harmful effects on people with type 2 diabetes mellitus (T2DM), such as hyperglycemia and increasing incidence of cardiovascular and cerebrovascular diseases. Epidemiological evidence shows that influenza vaccinations can effectively prevent deterioration in T2DM patients. At present, there is a lack of nationwide studies on the vaccination status of influenza vaccines for patients with certain chronic diseases. This study aimed to evaluate the influenza vaccination status of T2DM patients in mainland China and the factors affecting their influenza vaccination. Methods: Data were sourced from PubMed, Embase, Web of Science, the China Biology Medicine Disc (CBMdisc), the China National Knowledge Infrastructure (CNKI), and the Wanfang Database. The keywords used in the literature search included “diabetes”, “diabetes mellitus”, “DM”, “diabetic”, “T2DM”, “influenza vaccine”, “flu vaccine”, “China”, and “Chinese”. A total of 249 articles were retrieved through the searches; 7 articles met the inclusion criteria. The fixed-effects model was used when heterogeneity was low and a random-effects model was used when the heterogeneity was high. Results: The influenza vaccination coverage rate was 1.46% in diabetic patients and 9.99% in elderly diabetic patients. The influenza vaccination rate of type 2 diabetes patients with a high education level is higher than that of patients with a low education level. (OR: 1.462 [1.123, 1.903]). Meanwhile, gender (OR: 1.076, 95%CI: 0.893–1.295), marriage (OR: 1.283; 95%CI: 0.931–1.766), and occupation (OR: 1.049; 95% CI: 4.422–2.606) have no significant impact on influenza vaccination in patients with type 2 diabetes. Conclusions: This study found that the coverage of influenza vaccination in patients with T2DM in Chinese mainland was low, and there were few relevant research articles. In China’s mainland areas, education background is an important factor affecting the influenza vaccination of T2DM patients. China should continue to improve the influenza vaccination rate of patients with type 2 diabetes.

Patients with immune mediated inflammatory diseases are insufficiently protected against vaccine-preventable infections.

Patients with Immune Mediated Inflammatory Diseases (IMIDs) using immunosuppressive therapy are at increased risk of infections, including vaccine-preventable infections. In this study, we aimed to evaluate whether patients with IMIDs on systemic immunosuppressive therapy are vaccinated according to current guidelines. A survey was sent out, between August 2022 and March 2023, to all patients with IMIDs that visited the departments of dermatology, rheumatology and gastroenterology at an academic and regional hospital in Rotterdam, the Netherlands. Patient-reported vaccination status was compared to the Dutch guidelines on vaccinations in patients with chronic inflammatory diseases. A total of 1,905/5,987 patients responded to the survey (response rate 32%). After exclusion of patients without systemic immunosuppressive medication, the study population comprised 1,390 patients, median age 56 years (IQR 42-66) and 41% male. Most patients (92%) had been vaccinated according to the Dutch National Immunization Program. Before starting immunosuppressive therapy, 2% of the patients who were still considered at risk according to the Dutch guideline were vaccinated for measles, and 4% for diphtheria/tetanus/polio (DT-IPV). Additionally, 62% of patients received an annual influenza vaccine, 16% received a five-yearly pneumococcal vaccine, and 91% were fully vaccinated against COVID-19. Patients with IMIDs on immunosuppressive therapy are not vaccinated in accordance with the guidelines. Implementation strategies to improve the vaccination rates for patients with IMIDs should specifically focus on vaccinating against measles and diphtheria/tetanus/polio, and periodic vaccination against pneumococcal and influenza infections.

The status and influencing factors of COVID-19 vaccination in patients with COPD

In this study, we investigated the status and influencing factors of coronavirus disease 2019 (COVID-19) vaccination in patients with chronic obstructive pulmonary disease (COPD). A questionnaire on COVID-19 vaccination in patients with COPD was developed. The clinical characteristics, COVID-19 vaccination status, other relevant vaccinations, and vaccination status of the patients with COPD were collected anonymously. Logistic regression analysis was used to analyze the factors influencing COVID-19 vaccination in patients with COPD. There were 1898 returned questionnaires, of which 1874 were valid. The proportion of patients who completed the COVID-19 vaccination program was 78.60%. Factors influencing the COVID-19 vaccination rate were: the age of individuals who were 75–85 years old and > 85 years old, acute exacerbation 3–4 times in the previous year, comorbid cardiovascular and endocrine system diseases, failure to take regular medication for COPD, application of non-invasive ventilation machines, believing that their current health condition has deteriorated, believing that the current COVID-19 vaccine is not safe, medical staff not specifying whether they would recommend vaccination against COVID-19, medical staff not recommending the COVID-19 vaccine, and fear of adverse reactions and aggravation of COPD. Patients with COPD had a high COVID-19 vaccination rate in China, whereas patients with pneumonia, influenza, and herpes zoster had a low vaccination rate. Improving the patients’ understanding of the safety and effectiveness of the vaccine and promoting effective communication between medical staff and patients would help increase the vaccination rate of patients with COPD.

Vaccination against respiratory tract pathogens in primary immune deficiency patients receiving immunoglobulin replacement therapy.

Inborn errors of immunity (IEI) increase morbidity and mortality risks, particularly from respiratory tract infections. Hence, vaccination becomes pivotal for IEI patients. This study aims to examine the vaccination and respiratory tract infection rates in a diverse IEI patient cohort undergoing immunoglobulin replacement therapy (IGRT). We retrospectively evaluated IEI patients on IGRT at a tertiary care center. Data on vaccinations and respiratory infections were extracted from medical records. : The study included 33 patients (mean age= 37.7 ± 11.4 years; 17 male). The most common clinical phenotype in our cohort was primary antibody deficiencies (90.9%). Only two patients had a genetic diagnosis, both of whom were brothers diagnosed with Wiskott-Aldrich syndrome (WAS). Almost half (48.5%) of our patients had bronchiectasis and 81.8% were on prophylactic antibiotics. All patients with IEI included in the study were regularly receiving IGRT. The vaccination rate of patients against respiratory tract infections was 42.4%, 57.6%, and 78.8% for influenza, pneumococcus, and COVID-19, respectively. Only one patient (7.1%) who received the influenza vaccine developed an upper respiratory tract infection. However, viral panel analysis could not be performed for this patient as they did not present to the hospital. The COVID-19 vaccination rate was notably higher than that of other vaccines, likely due to increased awareness during the pandemic, aided by public advisories and media influence. We observed higher vaccination rates for the COVID-19 vaccine compared to other vaccines (influenza and pneumococcal vaccines). Although we observed the potential impact of social and governmental influence in increasing vaccination rates, it is crucial to acknowledge that vaccination decisions in IEI patients must be individualized.

Adherence to Advisory Committee on Immunization Practices in diabetes mellitus patients in Saudi Arabia: A multicenter retrospective study.

Patients with diabetes mellitus (DM) are predisposed to an increased risk of infection signifying the importance of vaccination to protect against its potentially severe complications. The Centers for Disease Control and Prevention/Advisory Committee on Immunization Practices (CDC/ACIP) issued immunization re-commendations to protect this patient population. To assess the adherence of patients with DM to the CDC/ACIP immunization recommendations in Saudi Arabia and to identify the factors associated with the vaccine adherence rate. An observational retrospective study conducted in 2023 was used to collect data on the vaccination records from 13 diabetes care centers in Saudi Arabia with 1000 eligible patients in phase I with data collected through chart review and 709 patients in phase II through online survey. Among participants, 10.01% (n = 71) had never received any vaccine, while 85.89% (n = 609) received at least one dose of the coronavirus disease 2019 (COVID-19) vaccine, and 34.83% (n = 247) had received the annual influenza vaccine. Only 2.96% (n = 21), 2.11% (n = 15), and 1.12% (n = 8) received herpes zoster, tetanus, diphtheria, and pertussis (Tdap), and human papillomavirus (HPV) vaccines, respectively. For patients with DM in Saudi Arabia, the rate of vaccination for annual influenza and COVID-19 vaccines was higher compared to other vaccinations such as herpes zoster, Tdap, pneumococcal, and HPV. Factors such as vaccine recommendations provided by family physicians or specialists, site of care, income level, DM-related hospitalization history, residency site, hemoglobin A1c (HbA1c) level, and health sector type can significantly influence the vaccination rate in patients with DM. Among non-vaccinated patients with DM, the most reported barriers were lack of knowledge and fear of side effects. This signifies the need for large-scale research in this area to identify additional factors that might facilitate adherence to CDC/ACIP vaccine recommendations in patients with DM. In Saudi Arabia, patients with DM showed higher vaccination rates for annual influenza and COVID-19 vaccines compared to other vaccinations such as herpes zoster, Tdap, pneumococcal, and HPV. Factors such as vaccine recommendations provided by family physicians or specialists, the site of care, income level, DM-related hospitalization history, residency site, HbA1c level, and health sector type can significantly influence the vaccination rate in patients with DM.

COVID-19 vaccination rate in patients admitted to the Immunology and Allergy Outpatient Clinic

Aim
 Misinformation, lack of awareness, and beliefs about vaccines can cause hesitations about vaccines and affect the rate of vaccination. We aimed to reveal the vaccination rates against coronavirus disease-19 (COVID-19) (vaccine types and dose), and the reasons for not being vaccinated in patients admitted to the immunology and allergy outpatient clinic. In addition, we aimed to find out whether allergic reactions were observed in vaccinated patients.
 Methods
 The history of COVID-19 and vaccination of patients admitted to the Immunology and Allergy Outpatient Clinic between December 2021 and February 2022 were evaluated retrospectively.
 Results
 In our study, which included 451 patients, the median age of the patients was 35 (range 18-82), and 61.2% were women. 16.9% of the patients admitted to the immunology and allergy outpatient clinic were never vaccinated, while the rate of those who did not receive two doses of vaccine was 26.6%. The top three reasons for not being vaccinated were fear of allergies, fear of adverse effects, and distrust of the vaccine, respectively. Unvaccinated patients were younger, which is statistically significant. Vaccination rate was found to be lower in drug allergy and immunodeficiencies compared to other disease groups. 
 Conclusion
 Understanding the causes of vaccine hesitations and increasing the vaccination rate by organizing public health campaigns is an important point in the control of the pandemic. Despite being rare, allergic reactions can be observed with COVID-19 vaccines. Therefore, immunologists and allergists play an important role in the COVID-19 vaccine program.

P837 Improving Vaccination Rates in Patients with Inflammatory Bowel Disease: A Single Centre Audit and Quality Improvement Project

Abstract Background Patients with inflammatory bowel disease (IBD) are at an increased risk of infections. Vaccine preventable diseases in patients with IBD are associated with high rates of hospitalizations, costs, mortality and longer hospitalizations. Despite societal recommendations, the uptake of vaccinations is still suboptimal. We aimed to conduct an audit of vaccination status in patients with IBD followed by a quality improvement project (QIP) to improve the vaccination rates in the outpatient clinic setting. Methods This is a retrospective cohort study in a tertiary hospital in Singapore. Patients with a confirmed diagnosis of IBD aged >18 years’ old who attended outpatient clinics between June to September 2022 were identified, and their influenza (IFV) and pneumococcal (PCV) vaccination status was assessed. A QIP was instituted to increase the rate of IFV and PCV coverage in this ambulatory population. Interventions were directed at both the provider and the patient. All providers were educated on vaccination schedules and a standardized electronic template was implemented for clarity of documentation. Laminated posters of vaccination guidelines were placed in each consultation room. All patients were issued with a personalized vaccination card documenting their vaccination status and serving as a prompt for subsequent consultations. We analysed the rate of IFV and PCV coverage post implementation from November 2022 to June 2023. Results 70 patients were identified in the pre-intervention cohort. 30 patients were either >65 years old or on immunosuppression, of which 6/30 (20%) received IFV and 11/30 (36.7%) already received PCV. In the post-intervention cohort, we assessed 187 consecutive patient clinic visits which comprised 115 unique patients. Baseline characteristics are detailed in Table 1. 73 patients were either aged > 65 years old or on immunosuppression, 65 patients had no IFV within 1 year, of which 20/65 (30.7%) obtained vaccination coverage for IFV in the post-intervention period (p=0.01). 63 patients were eligible for PCV and 12/63 (19%) received either pneumococcal conjugate vaccine 13 or pneumococcal polysaccharide vaccine 23 during this period (Fig. 1). Conclusion A structured QIP with an established protocol engaging patients and guiding providers significantly increased the rate of IFV but not PCV in our cohort. A major hurdle to timely PCV uptake was the erroneous perception of a wider window period by patients and providers given its 5-yearly interval, as compared to IFV. Overall adherence to societal guidelines and uptake of vaccinations is still suboptimal and more work needs to be done to educate providers and patients, increase vaccination uptake and reduce vaccine preventable diseases in patients with IBD.

Racial Disparities in Childhood Vaccination Rates

Background: Despite the high efficacy and safety of routine vaccinations, most of the United States is currently falling well short of the Healthy People 2020 goals for childhood vaccination rates. A large racial disparity exists within the IU Health (IUH) system, with about a 26% difference between Black/African American (BAA) and white patient vaccination rates as of 2022. Within IUH, the most commonly missed appointment is the 4-month well child check, a critical appointment for staying up to date on vaccinations. In response to this disparity, a pilot program was launched to assist BAA patients in scheduling, attending visits, and getting vaccinated. This study also investigates the roles of insurance, race, ethnicity, and gender in racial disparities of routine vaccination rates among IU Health pediatric patients at the Riley Pediatric Care Center (PCC).
 Project Methods: A cohort of patients at the PCC clinic who were not meeting vaccination recommendations were compared to the PCC patient population as a whole to identify drivers of under-vaccination. These patients were also compared to patients within the pilot vaccination program to assess program efficacy in scheduling and attending 4-month well child checks.
 Results: The largest differences between the cohort not meeting the vaccination measure and the PCC patient population were race and insurance status. Patients not meeting vaccination recommendations were more likely to be BAA and to use Medicaid. The pilot program patient population had much higher rates of attendance at 4-month well child checks and vaccination rates for rotavirus among BAA patients than the IUH BAA patient population as a whole.
 Conclusions: The data from this study will help identify drivers of racial disparities in vaccination rates and guide data-driven and community-informed interventions to ameliorate the disparity. The pilot program has shown great success and warrants strong consideration for increased investment and expansion.

Effect of Covid19 Pandemic on Preventive Vaccinations Among Patients with The End Stage Kidney Disease At New York Harbor VA Medical Center

Background: The COVID-19 pandemic revealed challenges and barriers in achieving high preventive vaccination rates. This study aimed to explore the effects of the pandemic on vaccination rates in patients with end stage kidney disease (kidney dialysis) patients in New York City. These patients compose a challenging cohort as their transplant optimization includes routine vaccinations including pneumococcal, flu, Hepatitis A and B, meningococcal, H flu, HPV, Tdap, RZV, and Covid. Materials and Methods: This study population consisted of 142 participants from two Veteran Affairs hospitals in New York City. Vaccination and demographic information were compiled via EMR and compared to long term US vaccination rates using exact binomial tests. Secondary analysis using generalized estimating equations was used to compare vaccination rates pre- and post-pandemic within the Brooklyn VA population controlling for demographic variables. Results: The combined vaccination rate for the post-pandemic period was found to be significantly lower than the pre-pandemic rate in the general US population for several vaccines, including Hepatitis A (CI: 0.088, 0.098; p<0.001), Influenza (CI: 0.68, 0.69, p<0.001), Meningococcal (CI: 0.34, 0.35; p<0.001), MMR (, CI: 0.51, 0.52; p=0.001), and TDAP (CI: 0.18, 0.20; p<0.001). Secondary analysis using generalized estimating equations controlling for age, race, and time on dialysis within the Brooklyn VA population revealed increases in post-pandemic vaccination rates for Shingles (subunit; B=1.03; 95% Wald CI: .178, 1.87; p=.018) and Hepatitis B (B=-.739; 95% Wald CI: .084, 1.39; p=.027), while a significant decrease was observed for Hep A (B=-2.65; 95% Wald CI: -4.4, -.90; p=.003). Conclusion: This data demonstrates that post-pandemic vaccination rates in VA dialysis patients is lower than the past 10-year US average for several vaccines including Hepatitis A, Influenza, Meningococcal, MMR, and TDAP. Mixed effects of pre- and post-pandemic vaccination rates within the Brooklyn VA were also found with a decreased vaccination rate for Hepatitis A, and increased rates for Shingles and Hepatitis B. Further study is needed to evaluate pandemic’s effect on these rates, disease prevention, and identify the reasons contributing to vaccine hesitancy vs. acceptance.

Vaccination coverage of children with rheumatic diseases compared with healthy controls: a retrospective case-control study

ABSTRACT Objective To reveal the vaccination status of patients with pediatric rheumatic disease (PedRD) and to compare this with healthy controls. Methods The electronic health records of the Ministry of Health regarding the vaccination status of children with PedRD followed in a tertiary hospital were analyzed cross-sectionally and compared with their healthy controls. The missing vaccines were reported according to individual, age-appropriate schedule and causes of skipped vaccines in both groups were investigated with an online survey. Results The vaccination rate of patients in the last examination was 71.4% (90/126) and 95.7% (110/115) in healthy controls (p < 0.001). Measles-mumps-rubella vaccine, diphtheria, the administration rates of the second dose of tetanus-acellular pertussis-inactivated polio and Haemophilus influenzae type B, chickenpox, and hepatitis A vaccines were significantly lower in patients than in controls (p values 0.004, 0.02, 0.01, 0.013, respectively). The pre-diagnosis incomplete vaccination proportion was significantly higher in the patient group (16.6%) than in healthy controls (4.3%) (p = 0.002). In the patient group, the proportion of incomplete live-attenuated vaccines after diagnosis (25%) was more than pre-diagnosis (61.1%) (p = 0.04), while the proportion of incomplete non-live vaccines before and after diagnosis was similar (47.2% and 50%, respectively) (p = 0.73). The major reasons for missed vaccines were physicians’ recommendations (15.6%), the presence of PedRD diagnosis (12.5%), and the drugs used (12.5%). Conclusion Vaccination coverage of PedRD patients has been shown to lag behind the routine vaccination schedule (71.4%). In addition to new recommendations, electronic health system records for vaccination may be appropriate for the follow-up of these patients, and the addition of reminder alerts may be useful to reduce the rate of missed vaccinations.

44032 Multidisciplinary approach to increasing vaccination rates of patients starting immunosuppressive therapies

44032 Multidisciplinary approach to increasing vaccination rates of patients starting immunosuppressive therapies

Low vaccination and infection rate of Omicron in patients with inflammatory bowel disease: a comparative study of three unique cohorts.

The SARS-CoV-2 Omicron variant caused a large-scale outbreak of COVID-19 in Shanghai, China. Patients with inflammatory bowel disease (IBD) are at high risk of infection due to immunosuppressive interventions. We aimed to investigate the vaccination information of patients with IBD and update a vaccination guide based on a comparison of vaccination in asymptomatic carriers and healthy individuals. This retrospective study was conducted during an Omicron variant wave. We assessed the vaccination status in patients with IBD, asymptomatic carriers and healthy individuals. Factors with unvaccinated status and adverse events following vaccination were also determined in patients with IBD. The vaccination rate was 51.2% in patients with IBD, 73.2% in asymptomatic carriers, and 96.1% in healthy individuals. Female sex (p = 0.012), Crohn's disease (p = 0.026), and disease behavior of B3 (p = 0.029) were factors that indicated a lower vaccination rate. A significantly higher proportion of healthy individuals had received one booster dose (76.8%) than asymptomatic carriers (43.4%) and patients with IBD (26.2%). Patients with IBD received vaccination without an increased risk of adverse events (p = 0.768). The vaccination rate of patients with IBD remains much lower than that of asymptomatic carriers and healthy individuals. The COVID-19 vaccine has been found to be safe among all three groups and patients with IBD are not more susceptible to adverse events.

COVID-19 vaccine uptake and hesitancy in Chinese patients with asthma

Objective Both patients and physicians may be hesitant toward vaccination in patients with asthma, which may result in lower vaccine uptake. The aim of this work was to investigate the vaccination rate, the adverse reactions, as well as the factors associated with vaccine acceptance and hesitancy toward COVID-19 vaccination among asthmatic patients in Beijing. Methods A multi-center, cross-sectional face-to-face survey was conducted in patients with asthma consecutively recruited from December 2021 to April 2022. The survey included asthma status, COVID-19 vaccine uptake and adverse reactions, and knowledge of and attitude toward COVID-19 vaccination. Results A total of 261 patients were enrolled. The rate of COVID-19 vaccination during the study period was 73.6%, as compared to 87.64% in the general population in China. Patients who were currently working, had received other vaccines in the past, and had had no adverse reactions to other vaccines, showed a higher rate of COVID-19 vaccination. Patients believing that the vaccination of family members and colleagues had a positive impact on their decision to get vaccinated, were more likely to get the COVID-19 vaccines. The COVID-19 vaccination rate was lower in those with poorly monitored asthma and those using biologic therapies. The adverse effects of COVID-19 vaccines in asthmatic patients were similar to those in the general population. Conclusion The COVID-19 vaccination rate in asthmatic patients was lower than the general population in China. Active measures should be taken to control asthma and increase vaccination rates in these patients.

Role of Healthcare Professionals and Sociodemographic Characteristics in COVID-19 Vaccination Acceptance among Uro-Oncology Patients: A Cross-Sectional Observational Study.

At the time when mass COVID-19 vaccination began, providing appropriate vaccination advice to uro-oncology patients became a challenge. This was a single-center cross-sectional observational study aimed to investigate the rate of COVID-19 vaccination among uro-oncology patients receiving systemic therapy for metastatic renal cell carcinoma and metastatic castration-resistant prostate cancer. Furthermore, we aimed to assess patients' attitudes and identify factors influencing their decision to vaccinate against COVID-19. Data on patients' sociodemographic characteristics, vaccination status, and awareness and attitudes about COVID-19 vaccination were collected from questionnaires completed by the patients. A total of 173 patients were enrolled in this study, and 124 (71.7%) of them completed the COVID-19 vaccination. Significantly higher vaccination rates were found in male patients, and also in older patients, highly educated patients, and those who lived with one household member. Furthermore, we found significantly higher vaccination rates in patients who had consulted with doctors involved in their treatment, particularly with urologists. A significant association was observed between COVID-19 vaccination and doctor's advice, family member influence, and personal beliefs toward the vaccination. Our study showed multiple associations of patients' sociodemographic characteristics with vaccination rates. Furthermore, consultation with doctors who are particularly involved in oncology treatment and advice received from them were associated with significantly higher vaccination rates among uro-oncology patients.

Taking a JAB at How Gastroenterologists Can Increase Vaccination Rates in Patients with Inflammatory Bowel Disease.

Taking a JAB at How Gastroenterologists Can Increase Vaccination Rates in Patients with Inflammatory Bowel Disease.

SOCIALLY VULNERABLE PATIENTS WITH INFLAMMATORY BOWEL DISEASE ARE AT INCREASED RISK FOR VACCINE PREVENTABLE ILLNESS

Inflammatory bowel disease (IBD) affects patients across diverse ethnic, minority, cultural, and socioeconomic backgrounds; however, the relationship between these social determinants of health (SDOH) and IBD outcomes is not well-studied. SDOH have a known impact on disparities in vaccination, but these effects may be more salient in the IBD population where patients are at greater risk for vaccine-preventable illness from immunosuppressive therapies. The social vulnerability index (SVI) is a tool provided by Centers for Disease Control that can identify individuals at risk for health care disparities by estimating neighborhood-level social need on a 0-1 scale (higher scores indicating greater social vulnerability). Utilizing census tract-level SVI data, we aimed to identify the relationship between the SDOH and vaccination rates in patients with IBD.

Rates of Influenza and Tdap Vaccination in Teaching and Private Obstetrical Practices, and the Influence of Vaccine Hesitancy

We evaluated differences in vaccination rates of patients of teaching and private practices, and explored the rate of vaccine hesitancy in pregnant women. This was a cross-sectional study of a convenience sample of recently delivered women. Women completed a survey, which included a question about whether they received the influenza and/or Tdap vaccine, and a vaccine hesitancy scale for both influenza and Tdap vaccines. We also reviewed prenatal records to confirm vaccine administration and collected demographic data. Patients who received care on the teaching service (care by residents supervised by faculty) were compared with those who received care from 26 private practitioners in nine groups. The primary outcome was rate of vaccination. Fisher's exact test was performed to compare groups. Of the 231 women approached, 208 (90.0%) agreed to participate. Of the 208 participants, 70 (33.7%) had prenatal care with a teaching practice, and 138 (66.3%) with a private practice. Patients of teaching practices had a higher influenza and Tdap vaccination rate compared with patients of private practices (Influenza: 70% versus 54.3%, p = 0.036; Tdap: 77.1% versus 58.4%, p = 0.009). Among the entire cohort, 55.3% had some degree of vaccine hesitancy. This did not differ between teaching and private practices (54.3% versus 55.8%, p = 0.883). In spite of similar prevalence of vaccine hesitancy, pregnant women cared for in teaching practices had higher vaccination rates than those cared for in private practices.

Effect of Electronic Nudges on Influenza Vaccination Rate in Older Adults With Cardiovascular Disease: Prespecified Analysis of the NUDGE-FLU Trial.

Influenza vaccines have been demonstrated to effectively reduce the incidence of influenza infection and potentially associated risks of cardiovascular events in patients with cardiovascular disease (CVD). Despite strong guideline and public health endorsements, global influenza vaccination rates in patients with CVD are highly variable. This prespecified analysis of NUDGE-FLU (Nationwide Utilization of Danish Government Electronic Letter System for Increasing Influenza Vaccine Uptake) examined the effect of digital behavioral nudges on influenza vaccine uptake based on the presence of CVD. NUDGE-FLU was a randomized, pragmatic, nationwide, register-based trial that included Danish citizens 65 years of age or older during the 2022 to 2023 influenza season. Households were randomized in a 9:1:1:1:1:1:1:1:1:1 ratio to usual care or 9 electronic letters with designs based on behavioral concepts. Danish nationwide registers were used to collect baseline and outcome data. The primary end point was receipt of an influenza vaccine on or before January 1, 2023. The effects of the intervention letters were examined according to the presence of CVD and across cardiovascular subgroups that included heart failure, ischemic heart disease, and atrial fibrillation. Of 964 870 NUDGE-FLU participants from 691 820 households, 264 392 (27.4%) had CVD. During follow-up, 83.1% of participants with CVD versus 79.2% of participants without CVD received an influenza vaccination (P<0.001). Compared with usual care, a letter emphasizing the potential cardiovascular benefits of influenza vaccination increased vaccination rates; this effect was consistent in participants with CVD (absolute difference, +0.60 percentage points [99.55% CI, -0.48 to 1.68]) and without CVD (+0.98 percentage points [99.55% CI, 0.27-1.70; P for interaction=0.41). A repeated letter strategy with a reminder follow-up letter 14 days later was also effective in increasing influenza vaccination, irrespective of CVD (CVD: absolute difference, +0.80 percentage points [99.55% CI, -0.27 to 1.86]; no CVD: +0.67 percentage points [99.55% CI, -0.06 to 1.40]; P for interaction=0.77). Effectiveness of both nudging strategies was consistent across all major CVD subgroups. None of the other 7 nudging strategies were effective, regardless of CVD status. Electronic letter interventions emphasizing the potential cardiovascular benefits of influenza vaccination and using a reminder letter strategy were similarly beneficial in increasing influenza vaccination rates among older adults with and without CVD and across cardiovascular subgroups. Electronic nudges may improve influenza vaccine uptake in individuals with CVD. URL: https://www. gov; Unique identifier: NCT05542004.

COVID-19 vaccination rate in patients with mental illness in a psychiatric hospital: a cohort study

IntroductionIndividuals with severe mental health problems are at greater risk of COVID-19 infection and increased risk of hospitalization and mortality. Vaccination against COVID-19 has demonstrated its importance in preventing and reducing these negative outcomes.ObjectivesThis study aims to assess the vaccination rate of people with mental illness in comparison with the general population.MethodsWe will conduct a retrospective evaluation of vaccine uptake in a sample of patients admitted to a psychiatric hospital between the 1st of July of 2021 and the 30th of June of 2022 in the Porto region. According to their vaccination plan, all patients were offered the possibility vaccination. Statistical analysis will be performed to analyse the data.ResultsWe expect to assess over 1500 patients. Regarding other studies on the same subject, although in different countries, we may predict that the vaccination rate in our sample will not, statistically, differ from the general population.ConclusionsSome studies have shown higher resistance and hesitancy towards the COVID-19 vaccination in mental health patients, however others did not find differences between these patients and the general population. Therefore, this study will allow us to better understand the impact of mental illness in the vaccination rate in our population.Disclosure of InterestNone Declared

The impact of severe mental illness (SMI) on the rate of COVID-19 vaccine uptake and hesitancy

IntroductionThe COVID-19 pandemic has disproportionately affected patients with severe mental illness (SMI), a vulnerable population with high morbidity and mortality. A UK-based study found reduced vaccination rates in patients with SMI; they therefore need to be prioritised for prevention and disease management.ObjectivesThe objectives were to determine risk factors for vaccine hesitancy, and how best to manage those in patients with SMI, as well as whether our intervention of calling patients for their vaccines had a positive outcome.MethodsFollowing approval from the Lambeth Directorate of South London and Maudsley (SLaM) NHS Foundation Trust, we investigated COVID-19 vaccination rates inpatients with SMI from a psychosis community service in South London (n=236). Dates of first and second doses were recorded through audit; reasons for refusal of vaccination were noted. Patients were encouraged to take the vaccine. A re-audit was performed after allowing three months. Chi-squared statistical analysis was performed to determine the value of our intervention.ResultsBefore the intervention, 143 patients (60.6%) received at least one vaccine. 24 patients (10.2%) received one dose, and 77 (32.8%) were yet to receive any. There was no statistical significance (p=0.1509) between the number of patients who received a vaccine before and after intervention, with 33.1% of patients still remaining unvaccinated.Image:Image 2:Image 3:ConclusionsThere is limited research on perceptions of receiving vaccines in patients with SMI, despite their cost-effectiveness in disease prevention. Even after intervention, 33.1% of patients remained unvaccinated, compared to 6.6% nationally. A lack of knowledge and recommendations from care teams are reasons for hesitancy. Misinformation, conspiracy theories and propaganda can drive people towards refusal. Patients with SMI typically have disadvantages of healthcare inequality, lower levels of education and access to inaccurate information. Patients and their healthcare team should be knowledgeable about vaccine efficacy and side effects. Studies have shown low uptake in the Black/African/Caribbean ethnic group (49.3%, table 3). Reasons include general mistrust in institutions and access barriers. For minority communities, vaccination sites in community centres or places of worship have proven to be effective, providing familiarity.Patients taking clozapine may have a weaker immune system due to myelosuppression. 24.3% of our patients take this, with many unsure of interactions or side effects. Poorer prognosis means a focussed approach is needed.Vaccine hesitancy is complex and requires targeted, tailor-made strategies, with consideration for patients who may lack capacity. It is evident from our results that calling patients alone may not be effective. A future multi-modal approach may be necessary to address poor vaccine uptake and opens up avenues to further explore vaccine hesitancy.Disclosure of InterestNone Declared