Incentive delivery timing and follow-up survey completion in a prospective cohort study of injured children: a randomized experiment comparing prepaid and postpaid incentives.
Millar MM, Olson LM, VanBuren JM, Richards R, Pollack MM, Holubkov R, Berg RA, Carcillo JA, McQuillen PS, Meert KL, Mourani PM, Burd RS. Incentive delivery timing and follow-up survey completion in a prospective cohort study of injured children: a randomized experiment comparing prepaid and postpaid incentives. BMC Med Res Methodol. 2021 10 27; 21(1):233.