TY - JOUR AU - Kelders, Saskia M AU - Van Gemert-Pijnen, Julia E.W.C AU - Werkman, Andrea AU - Nijland, Nicol AU - Seydel, Erwin R PY - 2011 DA - 2011/04/14 TI -基于网络的健康饮食和身体活动行为干预的有效性:关于用户和使用情况的随机对照试验随机对照试验千瓦-使用千瓦-电子健康千瓦-干预千瓦-消耗千瓦-互联网千瓦-坚持千瓦-保留背景:最近的研究表明，基于网络的干预措施在改变饮食和身体活动(PA)行为方面具有潜力。然而，这些变化的途径尚不清楚。此外，不使用对这些干预构成了威胁。人们对参与者预测使用的特征知之甚少。目的:在本研究中，我们调查了健康体重助手(HWA)的使用者和效果，这是一种基于网络的干预措施，旨在健康饮食和PA行为。我们调查了拟议框架的价值(包括社会和经济因素、条件相关因素、患者相关因素、使用原因和满意度)，以预测哪些参与者是用户，哪些参与者是非用户。此外，我们还调查了HWA在主要结局、自我报告的饮食和身体活动行为方面的有效性。方法:我们的设计是一项双臂随机对照试验，将HWA与等候名单对照条件进行比较。共有150名参与者被分配到等候名单组，147名参与者被分配到干预组。 Online questionnaires were filled out before the intervention period started and after the intervention period of 12 weeks. After the intervention period, respondents in the waiting list group could use the intervention. Objective usage data was obtained from the application itself. Results: In the intervention group, 64% (81/147) of respondents used the HWA at least once and were categorized as “users.” Of these, 49% (40/81) used the application only once. Increased age and not having a chronic condition increased the odds of having used the HWA (age: beta = 0.04, P = .02; chronic condition: beta = 2.24, P = .003). Within the intervention group, users scored better on dietary behavior and on knowledge about healthy behavior than nonusers (self-reported diet: χ22 = 8.4, P = .02; knowledge: F1,125 = 4.194, P = .04). Furthermore, users underestimated their behavior more often than nonusers, and nonusers overestimated their behavior more often than users (insight into dietary behavior: χ22 = 8.2, P = .02). Intention-to-treat analyses showed no meaningful significant effects of the intervention. Exploratory analyses of differences between pretest and posttest scores of users, nonusers, and the control group showed that on dietary behavior only the nonusers significantly improved (effect size r = −.23, P = .03), while on physical activity behavior only the users significantly improved (effect size r = −.17, P = .03). Conclusions: Respondents did not use the application as intended. From the proposed framework, a social and economic factor (age) and a condition-related factor (chronic condition) predicted usage. Moreover, users were healthier and more knowledgeable about healthy behavior than nonusers. We found no apparent effects of the intervention, although exploratory analyses showed that choosing to use or not to use the intervention led to different outcomes. Combined with the differences between groups at baseline, this seems to imply that these groups are truly different and should be treated as separate entities. Trial registration: Trial ID number: ISRCTN42687923; http://www.controlled-trials.com/ISRCTN42687923/ (Archived by WebCite at http://www.webcitation.org/5xnGmvQ9Y) SN - 1438-8871 UR - //www.mybigtv.com/2011/2/e32/ UR - https://doi.org/10.2196/jmir.1624 UR - http://www.ncbi.nlm.nih.gov/pubmed/21493191 DO - 10.2196/jmir.1624 ID - info:doi/10.2196/jmir.1624 ER -