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Effect of the Yon PD App on the Management of Self-Care in People With Parkinson Disease: Randomized Controlled Trial

Effect of the Yon PD App on the Management of Self-Care in People With Parkinson Disease: Randomized Controlled Trial

The sample size was calculated using the G*Power 3.1 program (Heinrich-Heine-Universität) [29]. The required sample size was 45 for each group with an effect size of 0.6, α level of .05, and power of 0.6. Considering a 20% dropout rate, the total number of participants was calculated as 108 [30]. For the intervention group, we provided a mobile app (Yon PD app) to help monitor the nonmotor symptoms of PD.

JuHee Lee, Subin Yoo, Yielin Kim, Eunyoung Kim, Hyeran Park, Young H Sohn, Yun Joong Kim, Seok Jong Chung, Kyoungwon Baik, Kiyeon Kim, Jee-Hye Yoo

J Med Internet Res 2025;27:e62822

Validation of Ecological Momentary Assessment With Reference to Accelerometer Data: Repeated-Measures Panel Study With Multilevel Modeling

Validation of Ecological Momentary Assessment With Reference to Accelerometer Data: Repeated-Measures Panel Study With Multilevel Modeling

The device is characterized by its compact size (4.6 cm × 3.3 cm × 1.5 cm) and lightweight design (19 g). The accelerometer collects the acceleration signal at a 30 Hz sampling rate. The acceleration signal is summed over a 60-second time interval (epoch) and stored as activity counts. In this study, we used the estimation of MVPA time, sedentary time, number of steps, and METs.

Jung Min Noh, SongHyun Im, JooYong Park, Jae Myung Kim, Miyoung Lee, Ji-Yeob Choi

J Med Internet Res 2025;27:e59878