Short-Term Effects of a Self-Monitoring-Based Intervention on Prolonged Sedentary Behavior in Older Adults With Cardiovascular Conditions: An Exploratory Secondary Analysis of a Randomized Controlled Trial

Background and purpose: This study was an exploratory secondary analysis of data from a previously conducted randomized controlled trial (RCT) involving older adults receiving long-term care (LTC). The present secondary analysis explored the effects of an accelerometer-guided self-monitoring intervention on prolonged sedentary behavior (≥ 30 min) and physical activity in older adults with cardiovascular conditions.

Methods

This exploratory secondary analysis used data from an RCT conducted at a Japanese daycare center (October 2022-January 2023). The parent RCT included 52 participants (26 in the intervention group and 26 in the control group). Of these, 36 participants with cardiovascular conditions were eligible for the present exploratory secondary analysis (intervention, n = 21; control, n = 15). The main outcome was prolonged sedentary behavior accumulated in bouts of ≥ 30 min. Other outcomes included daily step count, sedentary behavior in bouts of ≥ 1 and ≥ 60 min, sedentary bout counts and break counts, physical activity intensity, and EQ-5D-5L utility scores. Outcomes were analyzed using linear mixed-effects models.