Paul-Ebhohimhen V, Avenell A
University of Aberdeen, Health Services Research Unit, Aberdeen, UK.
Obes Rev. 2008 Jul;9(4):355-67. doi: 10.1111/j.1467-789X.2007.00409.x. Epub 2007 Oct 23.
Nine studies met the criteria for inclusion in this systematic review of randomized controlled trials of treatments for obesity and overweight involving the use of financial incentives, with reported follow-up of at least 1 year. All included trials were of behavioural obesity treatments. Justification of sample size and blinding procedure were not mentioned in any study. Attrition was well described in three studies and no study was analysed on an intention to treat basis. Participants were mostly women recruited through media advertisements. Mean age ranged from 35.7 to 52.8 years, and mean body mass index from 29.3 to 31.8 kg m(-2). Results from meta-analysis showed no significant effect of use of financial incentives on weight loss or maintenance at 12 months and 18 months. Further sub-analysis by mode of delivery and amount of incentives although also non-statistically significant were suggestive of very weak trends in favour of use of amounts greater than 1.2% personal disposable income, rewards for behaviour change rather than for weight, rewards based on group performance rather than for individual performance and rewards delivered by non-psychologists rather than delivered by psychologists.
九项研究符合纳入标准，被纳入本次关于使用经济激励措施治疗肥胖和超重的随机对照试验的系统评价，这些研究报告的随访时间至少为1年。所有纳入的试验均为行为性肥胖治疗。任何研究均未提及样本量和盲法程序的合理性。三项研究对失访情况进行了充分描述，且没有研究按照意向性分析进行分析。参与者大多是通过媒体广告招募的女性。平均年龄在35.7岁至52.8岁之间，平均体重指数在29.3至31.8kg/m²之间。荟萃分析结果显示，在12个月和18个月时，使用经济激励措施对体重减轻或维持体重没有显著影响。尽管按发放方式和激励金额进行的进一步亚组分析也无统计学意义，但提示出一些非常微弱的趋势，即倾向于使用大于个人可支配收入1.2%的金额、对行为改变而非体重的奖励、基于团体表现而非个人表现的奖励以及由非心理学家而非心理学家发放的奖励。
