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Published in: Supportive Care in Cancer 8/2016

Open Access 01-08-2016 | Original Article

Demographic, clinical, psychosocial, and environmental correlates of objectively assessed physical activity among breast cancer survivors

Authors: Caroline S Kampshoff, Fiona Stacey, Camille E Short, Willem van Mechelen, Mai JM Chinapaw, Johannes Brug, Ronald Plotnikoff, Erica L James, Laurien M Buffart

Published in: Supportive Care in Cancer | Issue 8/2016

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Abstract

Purpose

The aim of this study was to identify demographic, clinical, psychosocial, and environmental correlates of objectively assessed physical activity among breast cancer survivors.

Methods

Baseline data were utilized from 574 female breast cancer survivors who participated in three different intervention studies: Resistance and Endurance exercise After ChemoTherapy (REACT), Exercise and Nutrition Routine Improving Cancer Health (ENRICH), and Move More for Life (MM4L). Participants were eligible if they were aged ≥18 years and had completed primary cancer treatment. Physical activity was objectively assessed by accelerometers or pedometers. Participants completed self-reported questionnaires on demographic, psychosocial, and environmental factors. Information regarding clinical factors was obtained from medical records or patient self-report. Multivariable linear regression analyses were applied on the pooled dataset to identify factors that were significantly correlated with physical activity. In addition, the explained variance of the model was calculated.

Results

The multivariable regression model revealed that older age, (β = −0.01, 95 %CI = −0.02; −0.003), higher body mass index (β = −0.05, 95 %CI = −0.06; −0.03), lower self-efficacy (β = 0.2, 95 %CI = 0.08; 0.2), and less social support (β = 0.1, 95 %CI = 0.05; 0.2) were significantly correlated with lower physical activity. This model explained 15 % of the variance in physical activity.

Conclusion

Age, body mass index, self-efficacy, and social support were significantly correlated with objectively assessed physical activity in breast cancer survivors. It may therefore be recommended that physical activity intervention studies in these women target those who are older, and have a higher body mass index, and should operationalize behavior change strategies designed to enhance self-efficacy and social support.

Trial registration

The REACT study is registered at the Netherlands Trial Register [NTR2153]. The ENRICH study is registered at Australian New Zealand Clinical Trials Register [ANZCTRN12609001086257]. And the MM4L study is registered at Australian New Zealand Clinical Trials Register [ACTRN12611001061921]
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Metadata
Title
Demographic, clinical, psychosocial, and environmental correlates of objectively assessed physical activity among breast cancer survivors
Authors
Caroline S Kampshoff
Fiona Stacey
Camille E Short
Willem van Mechelen
Mai JM Chinapaw
Johannes Brug
Ronald Plotnikoff
Erica L James
Laurien M Buffart
Publication date
01-08-2016
Publisher
Springer Berlin Heidelberg
Published in
Supportive Care in Cancer / Issue 8/2016
Print ISSN: 0941-4355
Electronic ISSN: 1433-7339
DOI
https://doi.org/10.1007/s00520-016-3148-8

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