@Article{info:doi/10.2196/21636，作者=“李洁和宁，裴山和程，裴霞和Schwebel, David C和杨，杨和魏，向和何，结一和王，万辉和李，若彤和胡国清”，标题=“基于app的儿童伤害预防研究中参与者辍学的相关因素:《聚类随机对照试验辅助数据分析》，期刊=“J Med Internet Res”，年=“2021”，月=“Jan”，日=“29”，卷=“23”，号=“1”，页=“e21636”，关键词=“app干预;意外伤害;磨损;影响因素"，摘要="背景:移动保健(mHealth)干预措施具有覆盖大量人口和改善公共卫生的巨大潜力。然而，高流失率威胁着移动医疗干预研究的评估和实施。目的:我们在一项移动健康随机对照试验(RCT)中探讨了与研究参与者流失相关的因素，该试验评估了一项降低中国儿童意外伤害风险的干预措施。方法:采用聚类随机对照试验(cluster RCT)比较两组3-6岁儿童看护人应用程序干预的效果。干预组对儿童进行意外伤害和父母教育，对照组只进行父母教育。该试验在中国长沙纳入2920名研究参与者，持续6个月。 Data on participant engagement (using the app) were collected electronically throughout the 6-month period. Associations between participant attrition and demographic characteristics, and between attrition and intervention engagement were tested and quantified separately for the intervention and control groups using the adjusted odds ratio (aOR) based on generalized linear mixed models. Results: In total, 2920 caregivers from 20 eligible preschools participated, with 1510 in the intervention group and 1410 in the control group. The 6-month attrition rate differed significantly between the two groups (P<.001), at 28.9{\%} (437/1510) in the intervention group and 35.7{\%} (503/1410) in the control group. For the intervention group, the only significant predictor of attrition risk was participants who learned fewer knowledge segments (aOR 2.69, 95{\%} CI 1.19-6.09). For the control group, significant predictors of attrition risk were lower monthly login frequency (aOR 1.48, 95{\%} CI 1.00-2.18), learning fewer knowledge segments (aOR 1.70, 95{\%} CI 1.02-2.81), and shorter learning durations during app engagement (aOR 2.39, 95{\%} CI 1.11-5.15). Demographic characteristics were unrelated to attrition. Conclusions: Engagement in the app intervention was associated with participant attrition. Researchers and practitioners should consider how to best engage participants in app-based interventions to reduce attrition. Trial Registration: Chinese Clinical Trial Registry ChiCTR-IOR-17010438; http://www.chictr.org.cn/showproj.aspx?proj=17376 International Registered Report Identifier (IRRID): RR2-10.1186/s12889-018-5790-1 ", issn="1438-8871", doi="10.2196/21636", url="//www.mybigtv.com/2021/1/e21636", url="https://doi.org/10.2196/21636", url="http://www.ncbi.nlm.nih.gov/pubmed/33512318" }