Patel Mitesh S, Volpp Kevin G, Rosin Roy, Bellamy Scarlett L, Small Dylan S, Heuer Jack, Sproat Susan, Hyson Chris, Haff Nancy, Lee Samantha M, Wesby Lisa, Hoffer Karen, Shuttleworth David, Taylor Devon H, Hilbert Victoria, Zhu Jingsan, Yang Lin, Wang Xingmei, Asch David A
1 Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
2 Wharton School, University of Pennsylvania, Philadelphia, PA, USA.
Am J Health Promot. 2018 Sep;32(7):1568-1575. doi: 10.1177/0890117118758932. Epub 2018 Mar 13.
To evaluate the effect of lottery-based financial incentives in increasing physical activity.
Randomized, controlled trial.
University of Pennsylvania Employees.
A total of 209 adults with body mass index ≥27.
All participants used smartphones to track activity, were given a goal of 7000 steps per day, and received daily feedback on performance for 26 weeks. Participants randomly assigned to 1 of the 3 intervention arms received a financial incentive for 13 weeks and then were followed for 13 weeks without incentives. Daily lottery incentives were designed as a "higher frequency, smaller reward" (1 in 4 chance of winning $5), "jackpot" (1 in 400 chance of winning $500), or "combined lottery" (18% chance of $5 and 1% chance of $50).
Mean proportion of participant days step goals were achieved.
Multivariate regression.
During the intervention, the unadjusted mean proportion of participant days that goal was achieved was 0.26 in the control arm, 0.32 in the higher frequency, smaller reward lottery arm, 0.29 in the jackpot arm, and 0.38 in the combined lottery arm. In adjusted models, only the combined lottery arm was significantly greater than control ( P = .01). The jackpot arm had a significant decline of 0.13 ( P < .001) compared to control. There were no significant differences during follow-up.
Combined lottery incentives were most effective in increasing physical activity.
评估基于抽奖的经济激励措施对增加身体活动的效果。
随机对照试验。
宾夕法尼亚大学员工。
共有209名体重指数≥27的成年人。
所有参与者使用智能手机追踪活动情况，设定每天7000步的目标，并在26周内获得每日表现反馈。随机分配到3个干预组之一的参与者接受13周的经济激励，然后在无激励的情况下随访13周。每日抽奖激励措施设计为“高频小奖”（中奖概率为四分之一，奖金5美元）、“头奖”（中奖概率为四百 分之一，奖金500美元）或“组合抽奖”（5美元中奖概率为18%，500美元中奖概率为1%）。
达到参与者每日步数目标的平均比例。
多变量回归分析。
在干预期间，对照组达到目标的参与者天数的未调整平均比例为0.26，高频小奖抽奖组为0.32，头奖组为0.29，组合抽奖组为0.38。在调整模型中，只有组合抽奖组显著高于对照组（P = 0.01）。与对照组相比，头奖组显著下降了0.13（P < 0.001）。随访期间无显著差异。
组合抽奖激励措施在增加身体活动方面最有效。
