Long-term effects of a group-based weight-loss support program : A 2-year follow-up study of a randomized controlled trial

我们实施了一项为期30个月的随机对照试验，包括为期6个月的减肥干预和为期2年的随访，以检查基于群体的支持计划(UMIN000001259)的长期效果。研究对象为125名超重成人(女性92名，男性33名)，平均年龄51.2(6.8)岁，体重指数29.1(3.4)kg/m2。他们被随机分为中度干预组和强化干预组。两组都接受了单一的励志讲座和教育材料(教科书、笔记本和计步器)，而只有强化干预组接受了以小组为基础的支持计划。主要的结果衡量标准是体重减少量。在干预期内，两组患者的体重减轻效果显著。这一效果在1年和2年的随访中消失。总之，以团体为基础的支持计划是一种在短期内促进减肥的有效方法。为了取得长期效果，还需要采取更多的方法。

We implemented a 30-month randomized controlled trial comprising a 6-month weight-loss intervention and 2-year follow-up to examine the long-term effects of a group-based support program (UMIN000001259). The study included 125 overweight adults (92 women and 33 men) with a mean (SD) age of 51.2 (6.8) years and body mass index of 29.1 (3.4) kg/m^2. They were randomly assigned to either moderate or intensive intervention groups. Both the groups were given a single motivational lecture and educational materials (textbooks, notebooks, and a pedometer), whereas only the intensive intervention group underwent a group-based support program. The primary outcome measure was the amount of weight loss. There was a significant effectiveness in weight loss between the 2 groups during the intervention period. This effectiveness disappeared at 1-year and 2-year follow-up. In conclusion, a group-based support program is an effective method for promoting weight loss on a short-term basis. To achieve long-term effects, additional approaches are needed.