Factors associated with adherence to physical activity guidelines in patients with prostate cancer

4 min

Background

Physical activity has been proposed as a behavioural intervention to improve health and well-being outcomes for patients with cancer. Physical activity has been associated with an improvement in overall Quality of Life (QoL) and health status in patients with cancer and cancer survivors.

In numerous prostate cancer studies, results highlight the importance of physical activity in counteracting the negative side effects associated with prostate cancer treatment.

Regular physical activity participation has also been demonstrated to provide improvements in QoL and psychosocial well-being.

Importantly, research findings have established that physical activity can be safely tolerated in this patient group, with no reported effect on prostate-specific antigen levels, testosterone production or disease activity.

Aim

This study aimed to estimate the proportion of patients with prostate cancer meeting the National Physical Activity Guidelines of Australia (NPAGA) and determine sociodemographic and medical factors associated with meeting these guidelines.

Secondary aims included examining physical activity levels by treatment type and domain (leisure, work, transport and domestic) and establishing a predictive model of the likelihood that men with prostate cancer would meet NPAGA.

Methods

A questionnaire was mailed to 638 men with prostate cancer attending for treatment at the Alfred, Cabrini or Latrobe Regional Hospitals during 2010 and 2011, with a response rate of 59%.

Measures included International Physical Activity Questionnaire, Hospital Anxiety and Depression Scale, Functional Assessment of Cancer Therapy – Prostate and sociodemographic items. Data were collected over a 12-month period during 2010 and 2011.

Participant inclusion criteria was English speaking men aged 40 to 80 years, who had undergone radiotherapy between 9 and 30 months prior to the survey.

Physical activity was measured with the International Physical Activity Questionnaire (IPAQ), assessing four activity domains including work, transport, domestic and leisure time. It includes the frequency, intensity and duration of physical activity over the past 7 days.

Quality of life specific to prostate cancer and its treatment was measured using the 12-item prostate cancer subscale (PCS) of the Functional Assessment of Cancer Therapy – Prostate (FACT-P).

The Hospital Anxiety and Depression Scale (HADS) was used to assess symptoms of depression and anxiety, over the past 7 days.

Results

Of 356 men with prostate cancer, less than half were meeting NPAGA (41.9%). Lower education and QoL, a higher number of comorbid conditions and symptoms of depression and anxiety were associated with decreased leisure-time physical activity.

Patients treated with androgen deprivation therapy (ADT) were significantly less active than patients treated with radiotherapy only. Analyses indicated that the likelihood of meeting NPAGA was significantly lower with higher levels of depressive symptoms and lower levels of education.

A significant positive relationship was detected between leisure-time physical activity and QoL (p=<0.01). No relationships were found between leisure-time physical activity and time since diagnosis or age.

Conclusion

Meeting NPAGA is associated with higher QoL and psychosocial well-being in men with prostate cancer.

These findings provide helpful information to target physical activity intervention programmes to prostate cancer survivors, suggesting that 150 minutes of moderate intensity leisure-time physical activity weekly is sufficient to improve QoL in this patient group.

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