Association Between Participant Contact Attempts and Reports of Being Bothered in a National, Longitudinal Cohort Study of ARDS Survivors

Background Participant retention is a major challenge in clinical research, especially in studies with multiple, longitudinal research assessments. Despite the importance of retention methods, there is little empirical research on how cohort retention efforts are perceived by study participants. Research Question To evaluate the association between the number of attempts undertaken to contact participants for research assessments in a...