title: How to motivate whole blood donors to become plasma donors.
abstract: This study tested the efficacy of interventions to recruit new plasma donors among whole blood donors. A sample of 924 donors was randomized to one of three conditions: control; information only by nurse; and information plus self-positive image message by nurse (SPI). Participants in the control condition only received a leaflet describing the plasma donation procedure. In the two experimental conditions the leaflet was explained face-to-face by a nurse. The dependent variables were the proportion of new plasma donors and the number of donations at six months. Overall, 141 (15.3%) new plasma donors were recruited at six months. There were higher proportions of new plasma donors in the two experimental conditions compared to the control condition (P < .001); the two experimental conditions did not differ. Also, compared to the control condition, those in the experimental conditions (all Ps < .001) gave plasma more often (information only by nurse:  d = .26; SPI: d = .32); the SPI intervention significantly outperformed (P < .05) the information only by nurse condition. The results suggest that references to feelings of SPI such as feeling good and being proud and that giving plasma is a rewarding personal experience favor a higher frequency of plasma donation.
authors.affiliation: Research Group on Behavior and Health, Laval University, FSI-Vandry, Room 3493, Quebec City, QC, Canada G1V 0A6.
authors.forename: Gaston
authors.identifier: 0000-0003-3436-6783
authors.initials: G
authors.lastname: Godin
authors.affiliation: Medical Affairs, Héma-Québec, 1070, avenue des Sciences-de-la-Vie, Québec City, QC, Canada G1V 5C3.
authors.forename: Marc
authors.identifier: 0000-0002-8466-0916
authors.initials: M
authors.lastname: Germain