The effect of pair-based monetary contingency contracts for weight loss: Results from a randomized controlled pilot study.

Autor: Sykes-Muskett BJ; School of Psychology, University of Leeds, Leeds, UK., Prestwich A; School of Psychology, University of Leeds, Leeds, UK., Lawton RJ; School of Psychology, University of Leeds, Leeds, UK., Armitage CJ; Manchester Centre for Health Psychology, Division of Psychology and Mental Health, School of Health Sciences, University of Manchester, Manchester, UK.
Jazyk: angličtina
Zdroj: Obesity (Silver Spring, Md.) [Obesity (Silver Spring)] 2017 Mar; Vol. 25 (3), pp. 506-509. Date of Electronic Publication: 2017 Feb 01.
DOI: 10.1002/oby.21758
Abstrakt: Objective: Monetary contingency contracts (MCCs), in which deposited money is returned contingent on weight loss, could promote weight/adiposity reduction. This study piloted individual- and pair-based MCCs (when refunds are contingent on two individuals losing weight) and assessed effects on weight/body composition.
Methods: Seventy-seven participants with BMI greater than 25 kg/m 2 were recruited. In a non-blinded, randomized controlled trial conducted in a university laboratory setting, participants were randomized in pairs via a computer-generated sequence to one of four conditions: partner with pair-based refund (P-PBR), partner with individual refund (P-IR), individual weight loss with individual refund (I-IR), or no MCC (comparison). Refunds were contingent on weight loss after 4 and 8 weeks; weight/body composition was measured at 0, 4, and 8 weeks. Primary outcome measures were change in weight and fat mass.
Results: Seventy-seven participants (P-PBR n = 16; P-IR n = 20; I-IR n = 22; comparison n = 19) were recruited. Deposit amount was significantly positively associated with reductions in weight/BMI. At 8 weeks, the P-PBR condition reduced fat mass more than all other conditions (P < 0.05) and reduced weight/BMI more than the I-IR condition (P < 0.05).
Conclusions: The large effect of P-PBR on fat mass suggests it would be valuable to conduct a fully powered, randomized controlled trial of pair-based MCCs.
(© 2017 The Obesity Society.)
Databáze: MEDLINE
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