Findings

What do systematic reviews say?

1 questions · 1 findings · 1 reviews

No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 1 · 100%High 0 · 0%

Retention [ · trial participants being followed up for data collection

Questionnaire design: addition of diary to usual follow‐up probably leads to lower retention [ compared with usual follow‐up (moderate certainty).

1 finding from 1 review

Strategies to improve retention in randomised trials 2021 · Cochrane Headline outcomes only
RR 0.97 [0.96, 0.98]
2 studies · 9906 participants
Moderate