Speaker
Description
Background: Prostate cancer survivors (PCS) often experience challenges engaging in physical activity (PA) and reducing sedentary time (SED) after treatment. The Multi-Process Action Control framework (M-PAC) posits that attitudes, self-regulation, and habit predict behavior. This study identified M-PAC-based profiles and examined how they relate to SED and quality of life (QoL).
Methods: A cross-sectional analysis was conducted using baseline data from a randomized controlled trial of sedentary PCS. Eligible participants were aged ≥18 years and reported ≥8 h/day of SED. Six M-PAC indicators (affective attitudes, instrumental attitudes, perceived capability, perceived opportunity, behavioral regulation, and habit) were assessed using self-report. SED (Longitudinal Aging Study Amsterdam SED Questionnaire), PA (Godin Leisure-Time Exercise Questionnaire), QoL (FACT-G), Health & Disability (WHO Disability Assessment Schedule) and Fitbit-derived daily steps were also collected. Latent profile analysis identified psychosocial classes, followed by multinomial regression.
Results: Participants (N=115, Mage=69.4±9.9 years) had localized disease (80.9%) and treated with surgery (65.2%), radiation (40.9%), and/or androgen deprivation therapy (ADT) (29.6%). A 3-class model showed optimal interpretability. Class 1 (37.96%) demonstrated strong attitudes but weak regulation and habit. Class 2 (19.22%) showed low attitudes, capability opportunity, with modest regulation. Class 3 (42.81%) reflected highest capability, regulation, and habit. Class 3 also reported the highest PA, QoL, and lowest disability scores while Class 2 had the highest SED and lowest QoL. Compared with Class 3, PCS with higher PA were less likely in Class 1 (RRR = 0.97, CI: 0.95–0.99, p = .036), higher QoL was associated with lower odds of Class 2 (RRR = 0.94, CI: 0.90–0.98, p = .003), and ADT exposure observed in Class 1 (p = .08).
Conclusion: Distinct psychosocial profiles exist and show meaningful behavioral and QoL differences. Supportive care interventions that enhance capability, self-regulation, and habit may help PCS adopt and sustain healthier movement patterns.
Keywords
Prostate cancer; Survivorship; Sedentary behavior; Latent profile analysis
| Abstract submitters declaration | yes |
|---|---|
| Conflict of Interest & Ethical Approval | yes |
