Predictors of attendance to an oncologist-referred exercise program for women with breast cancer

Abstract

Purpose

While exercise is associated with numerous benefits in women with breast cancer, adherence to exercise training concurrent to cancer treatment is challenging. We aimed to identify predictors of attendance to an oncologist-referred exercise program offered during and after adjuvant breast cancer treatment.

Methods

Women with early-stage breast cancer receiving chemotherapy (n = 68) enrolled in the Nutrition and Exercise During Adjuvant Treatment (NExT) study. Supervised aerobic and resistance exercise was prescribed three times per week during treatment, then one to two times per week for 20 additional weeks. Predictors of attendance were identified using multivariate linear regression for three phases of the intervention, including during (1) adjuvant chemotherapy, (2) radiation, and (3) 20-weeks post-treatment.

Results

Higher baseline quality of life (QoL) predicted higher attendance during chemotherapy (β = 0.51%, 95 CI: 0.09, 0.93) and radiation (β = 0.85%, 95 CI: 0.28, 1.41), and higher QoL, measured at the end of treatment, predicted higher attendance post-treatment (β = 0.81%, 95 CI: 0.34, 1.28). Being employed pre-treatment (β = 34.08%, 95 CI: 5.71, 62.45) and a personal annual income > $80,000 (β = 32.70%, 95 CI: 0.85, 64.55) predicted higher attendance during radiation. Being divorced, separated or widowed (β = − 34.62%, 95 CI: − 56.33, − 12.90), or single (β = − 25.38%, 95 CI: − 40.64, − 10.13), relative to being married/common-law, and undergoing a second surgery (β = − 21.37%, 95 CI: − 33.10, − 9.65) predicted lower attendance post-treatment.

Conclusions

Demographic variables, QoL, and receipt of a second surgery significantly predicted attendance throughout the NExT supervised exercise program. These results may help identify individuals with exercise adherence challenges and improve the design of future interventions, including optimizing the timing of program delivery.

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Funding

This project was funded by the British Columbia Cancer Foundation.

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Correspondence to Kristin L. Campbell.

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The authors declare they have no conflicts of interest.

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Bland, K.A., Neil-Sztramko, S.E., Kirkham, A.A. et al. Predictors of attendance to an oncologist-referred exercise program for women with breast cancer. Support Care Cancer 26, 3297–3306 (2018). https://doi.org/10.1007/s00520-018-4180-7

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Keywords

  • Breast neoplasm
  • Adjuvant chemotherapy
  • Radiation
  • Exercise training
  • Resistance training