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Effect of Process- and Outcome-Based Financial Incentives on Weight Loss Among Prediabetic New York Medicaid Patients: A Randomized Clinical Trial.

1 David Eccles School of Business, University of Utah, Salt Lake City, UT, USA. 2 Department of Population Health, New York University School of Medicine, New York, NY, USA. 3 New York State Department of Health, Albany, NY, USA. 4 Center for Health Incentives and Behavioral Economics, Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA, USA. 5 Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. 6 BetterUp, San Franscisco, CA, USA. 7 Consultant, Albany, NY, USA. 8 MVP Health Care, Schenectady, NY, USA. 9 Department of Health Care Management, The Wharton School, University of Pennsylvania, Philadelphia, PA, USA. 10 Departments of Medicine and Medical Ethics and Health Policy, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. 11 Corporal Michael J. Crescenz VA Medical Center, Philadelphia, PA, USA.

American journal of health promotion : AJHP. 2019;(3):372-380
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Abstract

PURPOSE To determine whether different financial incentives are effective in promoting weight loss among prediabetic Medicaid recipients. DESIGN Four-group, multicenter, randomized clinical trial. SETTING AND PARTICIPANTS Medicaid managed care enrollees residing in New York, aged 18 to 64 years, and diagnosed as prediabetic or high risk for diabetes (N = 703). INTERVENTION In a 16-week program, participants were randomly assigned to one of 4 arms: (1) control (no incentives), (2) process incentives for attending weekly Diabetes Prevention Program sessions, (3) outcome incentives for achieving weekly weight loss goals, and (4) combined process and outcome incentives. MEASURES Weight loss over a 16-week period; proportion who completed educational sessions; proportion who met weight loss goals. ANALYSIS AND RESULTS No intervention arm achieved greater reduction in weight than control (outcome incentive -6.6 lb [-9.1 to -4.1 lb], process incentive -7.3 lb [-9.5 to -5.1 lb], combined incentive -5.8 lb [-8.8 to -2.8 lb], control -7.9 lb [-11.1 to -4.7 lb]; all P > .29). Session attendance in the process incentive arm (50%) was significantly higher than control (31%; P < .0001) and combined incentive arms (28%; P < .0001), but not significantly higher than the outcome incentive arm (38%). CONCLUSION Process incentives increased session attendance, but when combined at half strength with outcome incentives did not achieve that effect. There were no significant effects of either process or outcomes incentives on weight loss.

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