Published on in Vol 21, No 11 (2019): November
![User Engagement and Attrition in an App-Based Physical Activity Intervention: Secondary Analysis of a Randomized Controlled Trial User Engagement and Attrition in an App-Based Physical Activity Intervention: Secondary Analysis of a Randomized Controlled Trial](https://asset.jmir.pub/assets/ee116f2c4dff5feb4fdbcda37a5ef8f4.png 480w,https://asset.jmir.pub/assets/ee116f2c4dff5feb4fdbcda37a5ef8f4.png 960w,https://asset.jmir.pub/assets/ee116f2c4dff5feb4fdbcda37a5ef8f4.png 1920w,https://asset.jmir.pub/assets/ee116f2c4dff5feb4fdbcda37a5ef8f4.png 2500w)
1 Alliance for Research in Exercise, Nutrition and Activity, University of South Australia, Adelaide, Australia
2 Health and Biosecurity, Commonwealth Scientific and Industrial Research Organisation, Adelaide, Australia
3 Arnold School of Public Health, University of South Carolina, Columbia, SC, United States
4 Physical Activity Research Group, Appleton Institute, School of Health, Medical and Applied Sciences, Central Queensland University, Rockhampton, Australia
5 Priority Research Centre for Physical Activity and Nutrition, The University of Newcastle, Newcastle, Australia