The behaviorally-based weight control program conducted by Levitz and Jordan at the University of Pennsylvania and the Institute for Behavioral Education is tailored to patient needs and includes stimulus control, cognitive restructuring, and nutrition education. The success of patients in maintaining the clinically meaningful weight losses achieved during treatment was explored by interviewing 154 former clients who had finished treatment one to five years previously. Telephone reports of present weights and actual weigh-ins were obtained. Findings indicate: (1) the average amount of weight loss maintained was 58.4%; (2) 30% of the patients maintained or continued to lose; and (3) 18% of the patients regained all of the original weight lost. No overall predictions of weight maintenance were found. (Some findings of the Manitoba Obesity Control Center on obese families, i.e., families in which two or more members are at least 20% overweight, are also reviewed.) (NRB)