Sixty women and 55 men recruited from two sources participated in a weight reduction program with financial contracts. Experimental conditions were: (a) monetary commitment control, (b) contracts with constant refunds for weight loss, and (c) contracts with increasing refunds for weight loss. During 1 year of followup participants received one of two maintenance procedures or none. Increasing refunds produced greater initial weight losses than constant refunds, which were superior to monetary commitment-only. Gender and recruitment source were not significant short-term, but women were more successful than men in maintaining weight losses. Neither maintenance strategy effectively prevented weight gain during follow-up. Program attendance was highlighted as a mediating behavior predictive of outcome.
Bibliographical noteFunding Information:
This research was supported by NIH grant 1 R01 AM 26542-03 to Robert W. Jeffery. Requests for reprints or an extended report should be sent to Robert W. Jeffery, Division of Epidemiology, School of Public Health, University of Minnesota, Stadium Gate 27, 611 Beacon St. S.E., Minneapolis, MN 55455.