The Accuracy of Weight Reported in a Web-Based Obesity Treatment Program
The Accuracy of Weight Reported in a Web-Based Obesity Treatment Program
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DOI：
10.1089/tmj.2011.0032
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发表时间：
2011-11-01
影响因子：
4.7
通讯作者：
West, Delia S.
中科院分区：
文献类型：
--
作者：
Harvey-Berino, Jean;Krukowski, Rebecca A.;West, Delia S.
目的：本研究的总体目标是了解在6个月的基于网络的肥胖计划中自我报告体重的准确性。材料与方法：作为一项大型研究的一部分，受试者（n = 323; 93%女性; 28%非裔美国人）被随机分配到一个为期6个月的基于互联网的行为减肥计划，每周举行一次小组会议：（1）完全通过在线同步聊天或（2）在线聊天加上每月面对面小组会议的组合。在0个月和6个月时获得所有参与者的观察体重。每周将自我报告的体重提交给研究网站。按性别、人种和状况检查观察到的体重和报告的体重差异。结果：0个月和6个月时观察到的体重和报告的体重显著相关（r分别为0.996和0.996，ps < 0.001）。然而，6个月时报告的体重低估了观察到的体重0.86 kg（p < 0.001）。此外，存在显著的体重减轻效应（p < 0.001），其中体重减轻更多的那些人在6个月时更准确地估计其报告的体重。此外，6个月报告的体重变化与观察到的体重变化不同（差异= 0.72 kg，p < 0.001），使用报告的体重估计的体重变化略大于观察到的体重。结论：一般来说，对于参与基于互联网的减肥治疗计划的个人来说，自我报告体重的准确性很高。准确性略有不同的重量损失量，并没有改善定期在人的评估。重要的是，自我报告的体重变化与观察到的相当，这表明它适合基于网络的肥胖治疗。
Objective: The overall goal of the study was to understand the accuracy of self-reported weight over a 6-month Web-based obesity program. Materials and Methods: As part of a larger study, subjects (n = 323; 93% female; 28% African American) were randomized to a 6-month Internet-based behavioral weight loss program with weekly group meetings delivered either: (1) entirely by online synchronous chats or (2) by a combination of online chats plus monthly in-person group sessions. Observed weights were obtained at 0 and 6 months for all participants. Self-reported weights were submitted weekly to the study Web site. Differences in Observed and Reported weights were examined by gender, race, and condition. Results: Observed and Reported weight were significantly correlated at 0 and 6 months (r = 0.996 and 0.996, ps < 0.001 respectively). However, Reported weight underestimated Observed weight by 0.86 kg (p < 0.001) at 6 months. Further, there was a significant weight loss effect (p < 0.001) with those losing more weight more accurately estimating their Reported weight at 6 months. Additionally, 6-month Reported weight change differed from Observed weight change (difference = 0.72 kg, p < 0.001), with weight change using Reported weights estimating a slightly larger weight loss than Observed weights. Conclusions: In general, the accuracy of self-reported weight is high for individuals participating in an Internet-based weight loss treatment program. Accuracy differed slightly by amount of weight lost and was not improved with periodic in-person assessment. Importantly, weight change by self-report was comparable to observed, suggesting that it is suitable for Web-based obesity treatment.