Regular self-weighing is useful in obesity prevention. The impact of nudge-based occupational self-weighing programs in the cluster randomized controlled trial was examined. The primary outcome was regular self-weighing after 6 months, which we used to compute cost-effectiveness. Participants were Japanese local government employees who underwent 1 h workshops after being assigned to one of the three nudge groups. Each group was designed according to the nudges’ Easy, Attractive, Social, Timely framework: quiz group (n = 26, attractive-type nudges), implementation intentions group (n = 25, social-type nudges), and growth mindset group (n = 25, timely type nudges). A reference group (n = 36, no nudges) was also formed. After 6 months, all three interventions were effective for regular self-weighing, with the growth mindset intervention (60.0%) being significantly more effective. The cost-effectiveness of the growth mindset group was 1.7 times and 1.3 times higher than that of the quiz group and the implementation intentions group, respectively. Findings from our study are expected to facilitate the use of nudges for health practitioners and employers, which in turn may promote obesity prevention.

定期称体重有助于预防肥胖。在集群随机对照试验中检查了基于轻推的职业自我衡量计划的影响。主要结果是 6 个月后定期自我称重，我们用它来计算成本效益。参与者是日本地方政府雇员，他们在被分配到三个助推组之一后接受了 1 小时的研讨会。每个小组都是根据助推的简单、有吸引力、社交、及时的框架设计的：测验组（n = 26，吸引型助推）、实施意图组（n = 25，社交型助推）和成长心态组（ n = 25，及时类型推动）。还成立了一个参考组（n = 36，无助推）。6 个月后，所有三种干预都对定期自我称重有效，成长心态干预 (60. 0%）明显更有效。成长型思维组的成本效益分别是测验组和实施意向组的1.7倍和1.3倍。我们的研究结果有望促进对健康从业者和雇主的轻推，这反过来可能会促进肥胖预防。