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The Effectiveness of a Computer-Tailored Web-Based Physical Activity Intervention Using Fitbit Activity Trackers in Older Adults (Active for Life): Randomized Controlled Trial

The Effectiveness of a Computer-Tailored Web-Based Physical Activity Intervention Using Fitbit Activity Trackers in Older Adults (Active for Life): Randomized Controlled Trial

Power was set at 0.80 and the α at .05. The decision to end participant recruitment was made by the lead (SJA) and senior (CV) investigators because the trial was close to the sample size goal (n=243), the remaining funds were limited, and interest in the trial had slowed. Advertising materials directed prospective participants to the landing page of the intervention website, which had more details about study participation and access to the participant information sheet and eligibility survey.

Stephanie J Alley, Jannique van Uffelen, Stephanie Schoeppe, Lynne Parkinson, Susan Hunt, Deborah Power, Natasha Waterman, Courtney Waterman, Quyen G To, Mitch J Duncan, Anthony Schneiders, Corneel Vandelanotte

J Med Internet Res 2022;24(5):e31352