Swiss Research Institute for Public Health and Addiction, University of Zurich, Zurich, Switzerland.
Applied Social and Health Psychology, University of Zurich, Zurich, Switzerland.
JMIR Mhealth Uhealth. 2020 May 26;8(5):e16937. doi: 10.2196/16937.
Interventions to reduce alcohol use typically include several elements, such as information on the risks of alcohol consumption, planning for sensible drinking, and training of protective behavioral strategies. However, the effectiveness of these individual intervention elements within comprehensive programs has not been addressed so far, but it could provide valuable insights for the development of future interventions. Just-in-time interventions provided via mobile devices are intended to help people make healthy decisions in the moment and thus could influence health behavior.
The aim of this study was to test the proximal effects of a mobile phone-delivered, just-in-time planning intervention to reduce alcohol use in adolescents who reported recent binge drinking. The efficacy of this individual intervention element was tested within a comprehensive intervention program to reduce problem drinking in adolescents.
The study had an AB/BA crossover design, in which participants were randomly allocated to (1) a group receiving the planning intervention (A) in period 1 and assessment only (B) in period 2 or (2) a group receiving assessment only (B) in period 1 and the planning intervention (A) in period 2. The planning intervention included a text message to choose one of two predetermined if-then plans to practice sensible drinking with friends or when going out and a prompt to visualize the chosen plan. There was a washout period of at least 1 week between period 1 and period 2.
Out of 633 program participants who recently binge drank, 136 (21.5%) were receptive in both periods of time and provided data on the proximal outcome, which was the number of alcoholic drinks consumed with friends or when going out. After the planning intervention, the number of alcoholic drinks consumed was approximately one standard drink lower compared with the finding without the intervention (P=.01).
A mobile phone-delivered, just-in-time, if-then planning intervention to practice sensible drinking with friends or when going out is effective in reducing alcohol consumption among adolescents who report recent binge drinking. Based on the relatively low percentage of participants with self-reported receptivity for the planning intervention, measures to increase the population impact of similar planning interventions should be implemented and tested in future trials.
ISRCTN Registry ISRCTN52150713; http://www.isrctn.com/ISRCTN52150713.
减少饮酒的干预措施通常包括多个元素，例如关于饮酒风险的信息、合理饮酒计划的制定，以及保护性行为策略的培训。然而，到目前为止，还没有针对这些综合计划中个别干预元素的有效性进行研究，但这可能为未来干预措施的发展提供有价值的见解。通过移动设备提供的即时干预旨在帮助人们在当下做出健康决策，从而影响健康行为。
本研究旨在测试通过移动电话提供的即时计划干预对报告近期狂饮的青少年减少饮酒的近期效果。该即时干预元素的功效在一项旨在减少青少年问题饮酒的综合干预计划中进行了测试。
该研究采用 AB/BA 交叉设计，参与者被随机分配到（1）接受计划干预（A）的组在第 1 期和仅评估（B）的组在第 2 期，或（2）仅评估（B）的组在第 1 期和计划干预（A）的组在第 2 期。计划干预包括一条短信，让参与者选择两个预先设定的如果-那么计划之一，以与朋友或外出时合理饮酒，并提示参与者想象所选计划。第 1 期和第 2 期之间至少有 1 周的洗脱期。
在最近狂饮的 633 名项目参与者中，有 136 人（21.5%）在两个时间段都愿意接受，并提供了与近端结果相关的数据，即与朋友或外出时饮酒的酒精饮料数量。与没有干预时相比，接受计划干预后，与朋友或外出时饮酒的酒精饮料数量减少了大约 1 标准杯（P=.01）。
一种通过移动电话提供的即时、如果-那么的计划干预，以与朋友或外出时合理饮酒，可以有效减少报告近期狂饮的青少年的饮酒量。基于参与者对计划干预的自我报告接受率相对较低，应在未来的试验中实施和测试提高类似计划干预人群影响的措施。
ISRCTN 注册处 ISRCTN52150713；http://www.isrctn.com/ISRCTN52150713。
