Effect of group racial composition on weight loss in African Americans
Effect of group racial composition on weight loss in African Americans
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DOI：
10.1038/oby.2007.49
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发表时间：
2008-02-01
期刊：
影响因子：
6.9
通讯作者：
Svetkey, Laura P.
中科院分区：
文献类型：
--
作者：
Ard, Jamy D.;Kumanyika, Shiriki;Svetkey, Laura P.
目的：我们不知道一个群体的种族构成如何影响以群体为基础的减肥计划中非裔美国人(AAs)的行为改变。我们测试了这样的假设，即参加所有AA减肥干预组的AA比参加混合种族组的AA减掉的体重更多。方法和程序：这项观察性研究是减肥维持研究第一阶段的辅助，这是一项关于在20周的行为矫正计划后保持减肥策略的多中心试验。四个中心中有三个招募了几个全AA干预组。其余的组是AA和非AA参与者的组合。所有参与者都接受了同样的减肥干预。体重变化是主要结果，将所有AA组的参与者与由相同AA干预者进行的混合种族组的AA参与者进行比较。次要结果包括干预依从性和行为改变。结果：所有AA组的参与者(n=271)与其他AA参与者(n=106)相似。混合人种群体中AA的平均比例为56%。所有AA组参与者的体重减轻程度与混合组相似(-4.2 kg比-4.2 kg，P=0.97)。两组在平均参加会议的次数或饮食摄入量的变化方面没有差异。讨论：两组都观察到显著的体重下降，组组成对坚持或减肥结果没有影响。可能没有必要为所有AA组提供特殊的后勤服务。尽管教学环境不同，AA似乎对干预信息做出了积极的反应，饮食摄入量、体力活动(PA)和体重都发生了显著变化。
Objective: We do not know how racial composition of a group influences behavior change for African Americans (AAs) in group-based weight loss programs. We tested the hypothesis that AA who participate in all AA weight loss intervention groups will lose more weight than AA who participate in mixed race groups.Methods and Procedures: This observational study was ancillary to Phase 1 of the Weight Loss Maintenance Study, a multi-center trial of strategies to maintain weight loss after a 20-week behavior modification program. Three of four centers recruited several all-AA intervention groups. Remaining groups were combinations of AA and non-AA participants. All participants received the same weight loss intervention. Change in weight was the primary outcome, comparing participants of all-AA groups with AA participants of mixed race groups conducted by the same AA interventionists. Secondary outcomes included measures of intervention adherence and behavior change.Results: Participants of all-AA groups (n = 271) were comparable to other AA participants (n = 106). The mean proportion of AA in mixed race groups was 56%. All-AA group participants had similar weight loss as those in mixed groups (-4.2 vs. -4.2 kg, P = 0.97). There were no differences between the groups in mean number of sessions attended or changes in dietary intake.Discussion: Significant weight loss was observed in both groups, with no effect of group composition on adherence or weight loss outcomes. Special logistics to accommodate all-AA groups may not be necessary. Despite varying instructional environments, AA appeared to respond positively to intervention messages with significant changes in dietary intake, physical activity (PA), and weight.