ADAPT Micro-Randomized Trial
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 60
- 试验地点
- 2
- 主要终点
- Weekly number of minutes of moderate to vigorous physical activity
研究概览
简要总结
The goal of this study is to collect quantitative and qualitative data that can be used to optimize the HeartSteps mHealth intervention for physical activity. The current version of the intervention is intended to help patients with heart disease increase and maintain their physical activity long-term. To accomplish this goal, a 3-month pilot micro-randomized trial (MRT) will be conducted with 60 patients who are currently completing or have recently completed phase II cardiac rehabilitation (CR).
The core of the study participation is the use of the HeartSteps intervention over the course of 3 months. This includes wearing the Fitbit Charge activity tracker during waking hours and using the HeartSteps intervention to support their efforts to be active. The HeartSteps intervention consists of two sets of intervention components: (1) components intended to improve participants' affective associations with physical activity, including activity suggestions designed to to trigger positive feelings and associate them with being active, and prompts to bring their awareness to intrinsically motivating aspects of being active; and (2) components that target reflective self-regulatory processes, including graphs for self-monitoring, prompts to plan activity, and weekly activity goals. How exactly, and how much, participants will use HeartSteps will not be prescribed since our goal is to understand naturalistic trajectory of engagement with the intervention.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Supportive Care
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Must be a patient within the Michigan Medicine clinical system with data available in the electronic health record after January 1,
- •Age > 18
- •Owns and is a daily user of an Android or iPhone smartphone with study supported operating software.
- •Understands English to enable informed consent, completion of study-related surveys, and compliance with study notifications.
- •Will be completing within 30 days or have completed in the last 30 days the cardiac rehabilitation program at Michigan Medicine based on one of the following indications:
- •Coronary artery disease (including acute coronary syndromes and stable angina) following percutaneous coronary intervention (PCI)
- •Coronary artery disease following coronary artery bypass surgery (CABG)]
- •Valve repair or replacement (either surgical or percutaneous)
- •Coronary artery disease or an acute coronary syndrome not requiring revascularization
排除标准
- •Orthopedic or neurological condition limiting ability to actively engage in moderate intensity physical activity (e.g., brisk walking)
- •Greater than mild cognitive impairment
- •Wrist too large to wear an activity tracker comfortably. This will be assessed by asking participants "If they have ever had difficulty wearing a watch in the past due to the band being too small."
- •Currently receiving palliative care and/or in hospice care
- •Severe valvular stenosis or regurgitation
- •Unrevascularized left main coronary artery disease (> 50% obstruction on angiography) or proximal left anterior descending disease (>70% obstruction on angiography).
- •Exercise-induced ventricular tachycardia
- •Cardiac arrest within the prior 6 months
- •New York Heart Association (NYHA) class III or IV heart failure
- •Pulmonary arterial hypertension treated with inhaled or intravenous pulmonary hypertension-specific therapy
- •Ejection fraction <40%
- •Determined to be unsafe for participation in this program as assessed by a clinical nurse or investigative team.
研究组 & 干预措施
Intervention
Participants receive the HeartSteps mHealth intervention for 3 months to support and increase physical activity. Components include:
- Activity Suggestions: Push notifications encouraging walks, randomized twice daily (probability 0.5).
- Morning Salience Messages: Notifications highlighting positive aspects of activity, randomized daily (probability 0.5).
- Planning Prompts: Notifications to plan next day's activity, randomized daily (probability 0.5).
- Weekly Reflection: Prompts each Sunday to reflect on past activity, set goals, and plan for the next week.
- Pull Interventions: In-app features like activity dashboards and planning tools.
- Ecological Momentary Assessments (EMA): Daily and weekly surveys on psychosocial constructs related to physical activity.
Participants wear a Fitbit Charge tracker to monitor activity, synced to their MyDataHelps account. The intervention aims to optimize engagement and physical activity levels.
干预措施: mobile health app (Behavioral)
结局指标
主要结局
Weekly number of minutes of moderate to vigorous physical activity
时间窗: Baseline, 12 weeks
The primary outcome of the study is number of weekly minutes of moderate to vigorous physical activity (MVPA), as assessed by the Fitbit Charge 6 activity tracker. Primary analysis will assess the difference in MVPA between the baseline week and the last (i.e. 12th) week of the study.
次要结局
- Daily step count(12 weeks)
- 3-hour step count(12 weeks)
- Affective exercise experiences (AFFEXX) scale(Baseline, 12 weeks)
研究者
Pedja Klasnja
Associate Professor of Information
University of Michigan