Steele Rebekah, Mummery W Kerry, Dwyer Trudy
Central Queensland University, Rockhampton, Queensland, Australia.
J Phys Act Health. 2007 Jul;4(3):245-60. doi: 10.1123/jpah.4.3.245.
A growing number of the population are using the Internet for health information, such as physical activity (PA). The aim of this study was to examine the effectiveness of delivery modes for a behavior change program targeting PA.
A randomized trial was conducted with 192 subjects randomly allocated to either a face-to-face, Internet-mediated, or Internet-only arm of a 12-wk intervention. Subjects included inactive adults with Internet access. The primary outcome variable was self-reported PA, assessed at four time points.
The results showed no group x time interaction for PA F(6, 567) = 1.64, p > 0.05, and no main effect for group F(2, 189) = 1.58, p > 0.05. However, a main effect for time F(3, 567) = 75.7, p < 0.01 was observed for each group. All groups were statistically equivalent immediately post-intervention (p < 0.05), but not at the follow-up time points (p > 0.05). The Internet-mediated and Internet-only groups showed similar increases in PA to the face-to-face group immediately post-intervention.
This study provides evidence in support of the Internet in the delivery of PA interventions and highlights avenues for future research.
越来越多的人通过互联网获取健康信息，比如身体活动（PA）方面的信息。本研究旨在检验针对身体活动的行为改变项目的不同交付模式的效果。
对192名受试者进行了一项随机试验，将他们随机分配到为期12周干预的面对面组、互联网介导组或仅互联网组。受试者包括有互联网接入的不活跃成年人。主要结局变量是自我报告的身体活动情况，在四个时间点进行评估。
结果显示，身体活动方面不存在组×时间交互作用F(6, 567) = 1.64，p > 0.05，且组间不存在主效应F(2, 189) = 1.58，p > 0.05。然而，观察到每组时间的主效应F(3, 567) = 75.7，p < 0.01。所有组在干预后立即在统计学上等效（p < 0.05），但在随访时间点并非如此（p > 0.05）。在干预后立即，互联网介导组和仅互联网组的身体活动增加情况与面对面组相似。
本研究为互联网在身体活动干预的交付方面提供了支持证据，并突出了未来研究的方向。
