Characteristics of Participants and Nonparticipants in a Blended Internet-Based Physical Activity Trial for Breast and Prostate Cancer Survivors: Cross-sectional Study

Hester J vd Wiel   ¹ , MSc ;   Martijn M Stuiver   ^{2, 3} , PhD ;   Anne M May   ⁴ , PhD ;   Susan van Grinsven   ⁵ , PhD ;   Marlou F A Benink   ¹ , MSc ;   Neil K Aaronson   ¹ , PhD ;   Hester S A Oldenburg   ⁶ , MD, PhD ;   Henk G van der Poel   ⁷ , MD, PhD ;   Wim H van Harten   ^{1, 8, 9} , MD, PhD ;   Wim G Groen   ¹ , PhD

¹ Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute, Amsterdam, Netherlands

² Center of Expertise Urban Vitality, Faculty of Health, Amsterdam University of Applied Sciences, Amsterdam, Netherlands

³ Center for Quality of Life, Netherlands Cancer Institute, Amsterdam, Netherlands

⁴ Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Amsterdam, Netherlands

⁵ Rijnstate Hospital, Arnhem, Netherlands

⁶ Division of Surgical Oncology, The Netherlands Cancer Institute, Amsterdam, Netherlands

⁷ Department of Urology, The Netherlands Cancer Institute, Amsterdam, Netherlands

⁸ Rijnstate Hospital, Amsterdam, Netherlands

⁹ Department of Health Technology and Services research, University of Twente, Enschede, Netherlands