Published on in Vol 9, No 1 (2021): January
![Usability and Preliminary Effectiveness of a Preoperative mHealth App for People Undergoing Major Surgery: Pilot Randomized Controlled Trial Usability and Preliminary Effectiveness of a Preoperative mHealth App for People Undergoing Major Surgery: Pilot Randomized Controlled Trial](https://asset.jmir.pub/assets/4ff06e049aba5615579bad4fa1966a36.png 480w,https://asset.jmir.pub/assets/4ff06e049aba5615579bad4fa1966a36.png 960w,https://asset.jmir.pub/assets/4ff06e049aba5615579bad4fa1966a36.png 1920w,https://asset.jmir.pub/assets/4ff06e049aba5615579bad4fa1966a36.png 2500w)
1 Innovation of Human Movement Care Research Group, HU University of Applied Sciences, Utrecht, Netherlands
2 Department of Rehabilitation, Physical Therapy Science and Sports, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
3 Department of Rehabilitation Medicine, Amsterdam University Medical Center, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
4 Clinical Health Sciences, Program Physiotherapy Sciences, Utrecht University, Utrecht, Netherlands
5 Department of Anesthesiology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
6 Department of Anesthesiology, Amsterdam University Medical Center, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
7 Department of Surgery, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
8 Department of Surgery, Amsterdam University Medical Center, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
9 European School of Physiotherapy, Faculty of Health, Amsterdam University of Applied Sciences, Amsterdam, Netherlands
10 Amsterdam Public Health Research Institute, Amsterdam University Medical Center, Vrije Universiteit Amsterdam, Amsterdam, Netherlands