Howell-Jones, R., Gold, N., Bowen, S., et.al. (2023). Can uptake of childhood influenza immunisation through schools and GP practices be increased through behaviourally-informed invitation letters and reminders: two pragmatic randomized controlled trials. BMC Public Health, 23:143, 2023 Jan 20. doi: 10.1186/s12889-022-14439-4 [Flu Vaccination SM]
Intervention Components (click on component to see a list of all articles that use that intervention): Notification/Information Materials (Online Resources, Information Guide), Distribution of Promotional Items (Classroom/School),
Intervention Description: The intervention description mentioned in the provided text varies depending on the study being referred to. For the study involving GP practices, the intervention was a behaviorally-informed invitation letter sent to parents of two- and three-year-olds, which included several behavioral techniques such as simplification, personalization, and implementation intentions. The control group received usual care ,[object Object],, ,[object Object],. For the study involving schools, the interventions included a behaviorally-informed letter and a reminder (SMS/email) sent to parents. The behaviorally-informed letter included several behavioral techniques such as simplification, personalization, and a positive social norm statement. The reminder was sent by the schools to parents in the reminder arms. The control group received either a standard letter or no reminder ,[object Object],, ,[object Object],, ,[object Object],.
Intervention Results: The results mentioned in the provided text vary depending on the study being referred to. For the study involving GP practices, the behaviorally-informed invitation letter increased the uptake of childhood flu vaccine in general practice by 13.7% in absolute terms, compared to usual practice. The effect of the intervention remained significant after adjusting for demographic variables and interaction effects. The effect of the intervention did not differ between those who had and had not received a vaccination the previous year. Practices using SystmOne had higher uptake. There was variation between practices and CCGs, suggesting that there are practice/school level factors that influence uptake ,[object Object],, ,[object Object],. For the study involving schools, the behaviorally-informed letter did not have a statistically significant effect on vaccination uptake, but the reminder did lead to a small increase in uptake of the influenza vaccine in schools. The proportion of eligible students in the school year who were vaccinated increased with the reminder, but there was no effect of the letter nor any interaction effect. There was variation between school years and schools, suggesting that there are practice/school level factors that influence uptake ,[object Object],, ,[object Object],, ,[object Object],.
Conclusion: The conclusion mentioned in the provided text is that sending a behaviorally-informed invitation letter can increase uptake of childhood influenza vaccines at GP surgeries compared to usual practice. However, the effect size of the intervention was much smaller in school-based programs, with the behaviorally-informed letter not having a statistically significant effect on vaccination uptake. A reminder SMS or email, which follows on from an invitation letter, can lead to a small increase in uptake of the influenza vaccine in schools. The studies suggest that there are practice/school level factors that influence uptake, and future research investigating the effectiveness of behaviorally-informed letters should undertake process evaluation to better understand how and why the interventions may be effective ,[object Object],, ,[object Object],, ,[object Object],, ,[object Object],.
Study Design: The study design mentioned in the provided text is a randomized controlled trial (RCT) of behaviorally-informed interventions to improve childhood flu vaccination uptake in school-based programs. The study used a 2 × 2 factorial design, with schools within each strata randomly assigned to one of four intervention arms, one for each combination of interventions. The interventions included behaviorally-informed letters and reminders to assess their effects on vaccination uptake at GP practices and schools ,[object Object],, ,[object Object],.
Setting: The setting in the provided text appears to be related to a study or research project involving schools, child health, and vaccination uptake. The text mentions the religious denomination of the school, the type of school (state-funded primary, state-funded secondary, or independent), and the postcode of schools linked to the Index of Multiple Deprivation (IMD) data. Additionally, it discusses the sample size and power calculations based on the number of schools and children involved in the study ,[object Object],.
Population of Focus: The target audience for the information provided in the PDF seems to be researchers, public health professionals, and policymakers interested in childhood flu vaccination uptake in school-based programs. The content discusses a randomized controlled trial of behaviorally-informed interventions to improve vaccination uptake in schools, as well as the effects of letters and reminders on vaccine uptake at GP practices and schools ,[object Object],, ,[object Object],.
Sample Size: The sample size for the study involving schools and childhood flu vaccination uptake was determined by the number of schools in participating areas. Power calculations indicated that with the original number of schools available (~1700 schools and six providers) and assuming no variation between local authorities and an average of 100 children in years 1–3 in each school, the study would have 90% power to detect a 1% absolute increase in uptake, from 63% to 64% ,[object Object],.
Age Range: The age range mentioned in the provided text is 2 to 16 years old. The UK Joint Committee on Vaccination and Immunisation recommended a national childhood influenza immunisation program to be rolled out to 2- to 16-year-olds, using a live attenuated influenza vaccine ,[object Object],.
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