Determinants of physical activity and quality of life in breast cancer survivors

Physical activity (PA) is associated with reduced side effects and enhanced quality of life (QOL) in breast cancer survivors. However, PA participation in this population is abysmal. The purpose of this study was to test a social cognitive theory (SCT) model of (a) PA behavior and (b) PA and QOL in a sample of breast cancer survivors (N = 370; M age = 56. 5) over a 6-month period. Participants wore an accelerometer and completed measures of PA, self-efficacy, goals, outcome expectations, fatigue, social support, health status, and global QOL. It was hypothesized that (a) self-efficacy directly and indirectly influences PA through goals, social support, fatigue, and outcome expectations, and (b) PA indirectly influences global QOL through self-efficacy and health status. Relationships were examined using panel analysis within a covariance modeling framework. Model A provided a good model-data fit (χ2 = 577.98, df = 261, p = 0.00; CFI= 0.95; RMSEA = 0.06; SRMR = 0.06). At baseline, self-efficacy directly and indirectly, via goals, influenced PA. The same results were found for changes in these constructs. Model B was a good fit to the data (χ2 = 278.70, df = 127, p = 0.00; CFI= 0.95; RMSEA= 0.07; SRMR= 0.06). PA indirectly influenced global QOL via self-efficacy and health status at baseline and the same relationships were found for changes in model constructs. These results support the use of SCT to understand PA behavior and QOL in breast cancer survivors. Recommendations are made relative to future examinations of these models.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Kinesiology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• White, Siobhan M.

Contributors dc:contributor

• McAuley, Edward
• Chodzko-Zajko, Wojtek
• Motl, Robert W.
• Kramer, Arthur F.

• physical activity
• social cognitive theory
• quality of life
• breast cancer survivors

Statement dc:rights

• Copyright 2011 Siobhan M. White

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/26384

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F26384