Background
CMD
RECRUITMENT, TYPE 2 DIABETES, DISEASES, CARDIOVASCULAR DISEASES
Cardiometabolic diseases (CMD), including type 2 diabetes and cardiovascular diseases, pose a major individual and societal burden [It is clear that solely providing information on a healthy lifestyle is not sufficient to change behaviour, as many other individual-level factors than knowledge affect lifestyle behaviour, including motivations, beliefs, personal resources and preferences [The effectiveness of lifestyle programmes is usually evaluated by randomised controlled trials, for which the inclusion of sufficient study participants is paramount. Low inclusion rates can result in a lack of statistical power to evaluate study findings [The combination of active and passive recruitment strategies is often used. Examples are the use of flyers, email invites or social media posts (all passive strategies) and face-to-face recruitment at the location of the target population (active strategy) [Previous studies show that adults with a low SEP are a diverse group for whom various barriers exist to participate in healthy lifestyle programmes. Also, response rates are often lower than for those with a high SEP [Insights from projects into recruitment strategies and costs, participant enrolment rates and characteristics of the included study sample are valuable to learn from and for planning of new projects. However, detailed recruitment information and especially insights into costs and yield in terms of participant characteristics are rarely reported. We conducted a real-life trial—the Supreme Nudge trial—that aimed to promote healthy lifestyle behaviours within socially disadvantaged neighbourhoods in the Netherlands [