Peer mentoring for physical activity adoption and maintenance among breast cancer survivors: moderators of physical activity outcomes

Purpose We aimed to identify the moderators of maintenance strategies’ effects to assist cancer care organizations that offer peer mentoring physical activity programs. Methods A total of 161 inactive breast cancer survivors participated in a 12-month study and were randomized to one of three conditions at baseline. American Cancer Society’s Reach to Recovery coaches delivered weekly calls to participants for the first 3 months. During Months 4–9, participants self-monitored PA and received feedback (Reach Plus) or additionally received monthly calls from coaches (Reach Plus Phone) or weekly text/email messages (Reach Plus Message). Moderate-to-vigorous PA (MVPA) was assessed using self-report and accelerometry at baseline, 3, 6, 9, and 12 months. We examined baseline demographics, cancer-specific, and social cognitive variables as potential moderators of MVPA. Using Latent Class Models, we identified three participant profiles. The profile was used as a moderator in longitudinal mixed-effects models of MVPA. Results Profile 1 (44