Participants who were difficult to recruit at baseline are less likely to complete a follow-up questionnaire – results from the German National Cohort

With declining response proportions in population-based research the importance of evaluating the effectiveness of measures aimed at improving response increases. We investigated whether an additional flyer wi...

Source: BMC Medical Research Methodology - July 9, 2020 Category: Research Authors: Stefan Rach, Kathrin G ünther and Birte Hadeler Tags: Research article Source Type: research