TY -非盟的华纳、米利暗盟——Martin-Diener,伊娃AU -鲍尔,Georg盟——Braun-Fahrlander夏洛特AU -马丁,Brian W PY - 2010 DA - 2010/2/10 TI -比较试验参与者和开放获取用户的基于web的体力活动干预对于依从性,摩擦,和重复参与乔- J地中海互联网Res SP - e3六世- 12 - 1 KW -互联网KW -干预千瓦量身定制用户特征KW -时间趋势AB -背景:基于网络的干预措施在促进身体活动等健康生活方式方面很受欢迎。然而，很少有人知道用户特征，坚持，磨损，和预测重复参与开放获取体育活动网站。目的:本研究的重点是Active-online，一种基于web的个人量身定制的体育活动干预。目的是(1)评估和比较用户特征和对网站的依从性(a)在2003年至2009年开放获取背景下，以及(b)试验参与者和开放获取用户之间;(2)在随机对照试验中，与注册开放获取用户进行比较，分析参与者重复使用的磨损和预测因素。方法:采用在线活跃用户数据库中常规记录的数据。依从性的定义为:浏览页面的数量，开始定制模块的访问比例，收到定制反馈的访问比例，以及在定制模块上花费的时间。根据6个一年期(2003-2009)和基于首次访问和最长访问的背景(试验或开放获取)分析依从性。在试验参与者和开放获取用户之间比较了重复参与的磨损和预测因素。 Results: The number of recorded visits per year on Active-online decreased from 42,626 in 2003-2004 to 8343 in 2008-2009 (each of six one-year time periods ran from April 23 to April 22 of the following year). The mean age of users was between 38.4 and 43.1 years in all time periods and both contexts. The proportion of women increased from 49.5% in 2003-2004 to 61.3% in 2008-2009 (P< .001). There were differences but no consistent time trends in adherence to Active-online. The mean age of trial participants was 43.1 years, and 74.9% were women. Comparing contexts, adherence was highest for registered open access users. For open access users, adherence was similar during the first and the longest visits; for trial participants, adherence was lower during the first visits and higher during the longest visits. Of registered open access users and trial participants, 25.8% and 67.3% respectively visited Active-online repeatedly (P< .001). Predictors of repeated use were male sex (odds ratio [OR] = 1.2, 95% confidence interval [CI] = 1.04-1.38) and increasing age category in registered open access users, and age 46-60 versus < 30 years (OR = 3.04, 95% CI = 1.25-7.38) and Swiss nationality (ORnonSwiss= 0.64, 95% CI = 0.41-1.00) in trial participants. Despite reminder emails, attrition was much higher in registered open access users compared with trial participants, with a median lifetime website usage of 0 days in open access users and 290 days in trial participants. Conclusions: Adherence, patterns of use, attrition, and repeated participation differed between trial participants and open access users. Reminder emails to encourage repeated participation were effective for trial participants but not for registered open access users. These issues are important when interpreting results of randomized controlled effectiveness trials. SN - 1438-8871 UR - //www.mybigtv.com/2010/1/e3/ UR - https://doi.org/10.2196/jmir.1361 UR - http://www.ncbi.nlm.nih.gov/pubmed/20147006 DO - 10.2196/jmir.1361 ID - info:doi/10.2196/jmir.1361 ER -