@Article{信息:doi 10.2196 / / jmir。5147，作者="Storm, Vera和D{\"o}renk{\"a}mper, Julia和Reinwand, Dominique Alexandra和Wienert, Julian和De Vries, Hein和Lippke, Sonia"，标题="基于web的计算机定制的多种生活方式干预对降低心血管风险感兴趣的人的有效性:随机对照试验"，期刊="J Med Internet Res"，年="2016"，月="Apr"，日="11"，卷="18"，数="4"，页数="e78"，关键词="基于web的干预;电脑裁剪;心血管疾病;习惯的力量;自我效能感;背景:基于网络的计算机定制的多种健康行为干预可以提高想要降低心血管风险的人的行为习惯强度。然而，迄今为止，很少有随机对照试验验证了这一假设。目的:该研究旨在测试一项为期8周的基于网络的计算机定制干预措施，旨在提高想要降低心血管风险的人的体育活动习惯强度和水果和蔬菜消费。在一项随机对照设计中，评估了自我报告的感知习惯强度、自我效能和不同体育活动领域的计划以及水果和蔬菜消费的变化。 Methods: This study was a randomized controlled trial involving an intervention group (n=403) and a waiting control group (n=387). Web-based data collection was performed in Germany and the Netherlands during 2013-2015. The intervention content was based on the Health Action Process Approach and involved personalized feedback on lifestyle behaviors, which indicated whether participants complied with behavioral guidelines for physical activity and fruit and vegetable consumption. There were three Web-based assessments: baseline (T0, N=790), a posttest 8 weeks after the baseline (T1, n=206), and a follow-up 3 months after the baseline (T2, n=121). Data analysis was conducted by analyzing variances and structural equation analysis. Results: Significant group by time interactions revealed superior treatment effects for the intervention group, with substantially higher increases in self-reported habit strength for physical activity (F1,199=7.71, P=.006, Cohen's d=0.37) and fruit and vegetable consumption (F1,199=7.71, P=.006, Cohen's d=0.30) at posttest T1 for the intervention group. Mediation analyses yielded behavior-specific sequential mediator effects for T1 planning and T1 self-efficacy between the intervention and habit strength at follow-up T2 (fruit and vegetable consumption: beta=0.12, 95{\%} CI 0.09-0.16, P<.001; physical activity: beta=0.04, 95{\%} CI 0.02-0.06, P<.001). Conclusions: Our findings indicate the general effectiveness and practicality of Web-based computer-tailored interventions in terms of increasing self-reported habit strength for physical activity and fruit and vegetable consumption. Self-efficacy and planning may play major roles in the mechanisms that facilitate the habit strength of these behaviors; therefore, they should be actively promoted in Web-based interventions. Although the results need to take into account the high dropout rates and medium effect sizes, a large number of people were reached and changes in habit strength were achieved after 3 months. Trial Registration: Clinicaltrials.gov NCT01909349; https://clinicaltrials.gov/ct2/show/NCT01909349 (Archived by WebCite at http://www.webcitation.org/6g5F0qoft) and Nederlands Trial Register NTR3706 http://www.trialregister.nl/ trialreg/admin/rctview.asp?TC=3706 (Archived by WebCite at http://www.webcitation.org/6g5F5HMLX) ", issn="1438-8871", doi="10.2196/jmir.5147", url="//www.mybigtv.com/2016/4/e78/", url="https://doi.org/10.2196/jmir.5147", url="http://www.ncbi.nlm.nih.gov/pubmed/27068880" }