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Physical activity and quality of life in breast cancer survivors: the role of self‐efficacy and health status
Author(s) -
Phillips Siobhan M.,
McAuley Edward
Publication year - 2014
Publication title -
psycho‐oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.41
H-Index - 137
eISSN - 1099-1611
pISSN - 1057-9249
DOI - 10.1002/pon.3366
Subject(s) - breast cancer , quality of life (healthcare) , physical activity , medicine , gerontology , cancer , physical therapy , nursing
Abstract Objective Mechanisms underlying the relationship between physical activity and quality of life (QOL) in breast cancer survivors are not well understood. The purpose of the present study was to longitudinally test a model examining self‐efficacy and health status as potential mediators of this relationship. Methods At baseline and 6 months, breast cancer survivors ( n = 1527) completed physical activity, self‐efficacy, health status, and QOL measures, and a subsample ( n = 370) wore an accelerometer. Panel analysis within a covariance modeling framework was used to test the hypothesis that physical activity indirectly influences QOL across time. Results The hypothesized model provided a good fit in the full sample ( χ 2 = 409.06; d.f. = 91, p < 0.001; comparative fit index (CFI) = 0.98; standardized root mean residual (SRMR) = 0.04) and the accelerometer subsample ( χ 2 = 320.96, d.f. = 134, p < 0.001; CFI = 0.95; SRMR = 0.05), indicating that physical activity indirectly, via self‐efficacy and health status indicators, influences QOL across time. Conclusions Physical activity may influence QOL in breast cancer survivors through more proximal, modifiable factors. Copyright © 2013 John Wiley & Sons, Ltd.