Effects of physical activity on symptoms in prostate cancer survivors.

Abstract

e20540 Background: Physical activity (PA) in prostate cancer (PC) survivors improves general QOL and fatigue, but the relationship between PA and genitourinary symptoms in PC survivors is unknown. The incidence of sexual dysfunction may be as high as 68% during active surveillance and 78% in men receiving conventional therapies. PA has mitigated erectile dysfunction in non-prostate cancer populations. Objective: To determine the relationships among PA, age, co-morbidities, mental and physical health and symptoms, particularly related to sexual dysfunction, experienced by men with PC prior to therapy. Methods: Study Design: Correlational/cross sectional secondary analysis of de-identified data from 258 men with early stage PC prior to initiation of therapy. Variables: Habitual PA (Baecke Questionnaire- BAQ), physical (PCS) and mental health (MCS) (SF-36) and urinary, bowel and sexual dysfunctional symptoms (UCLA Prostate Cancer Index). Analysis: Descriptive statistics; correlations; hierarchical regressions to assess moderating and mediating relationships. Results: Mean Age = 63.2 + 8.1 yrs. BAQ activity scores, ranged from 2.2 to 12.1 (M and SD= 6.8+1.9), indicating low levels of PA. PCI mean scores = 92+13, urinary; 88 +13, bowel; 52 +29 for sexual. PA was negatively correlated with sexual symptoms (r=0.31; p<0.001). Physical health was negatively associated with all symptoms and age, but positively correlated with PA (r=0.21; p=0.001). Physical health mediates effects of age for urinary symptoms and partially for sexual symptoms. PA’s relationship to sexual dysfunctional symptoms was independent of age and was at least partially mediated by physical health. Conclusions: Urinary, bowel and sexual symptoms experienced by men at time of diagnosis were similar to men of similar age without PC, indicating age as the dominant predictor of symptoms. This study identified potential mechanisms of symptoms in early stage PC that warrant further testing. Symptoms related to sexual dysfunction may be especially amenable to PA.