Publication | Open Access
Scoop pen sub-study-a ‘trial within a trial’ of enclosing a pen in questionnaire mailings to increase response rate
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2015
Year
PsychometricsTrial ’Mental HealthPsychologySocial SciencesSurvey (Human Research)Randomized Controlled TrialPatient-reported OutcomeSelf-report StudyBehavioral SciencesMeta-analysisPsychiatryResponse RateResearch DesignPen GroupQuestionnaire MailingsResponse RatesPerformance StudiesWeb Survey MethodMedicineSurvey Methodology60-Month Questionnaire
Results Of the 3,789 participants sent a 60-month questionnaire in the pen group, 3,500 (92.4%) returned it compared with 3,462/3,793 (91.3%) in the control group (OR 1.16, 95% CI 0.98 to 1.37, p=0.08). There was evidence of a reduction of the number of reminders required (p=0.02) and the time taken to respond (p=0.01) in the pen group. Some difference was found in the completeness of the primary outcome (p=0.05). The pooled OR of response rates from the meta-analysis was 1.21 (95% CI 1.05 to 1.39, p=0.01).