Factors impacting on sexual function among men on active surveillance for prostate cancer

Active surveillance (AS) aims to reduce overtreatment and minimize the negative side effects of radical therapies (i.e., prostatectomy or radiotherapy) while preserving quality of life. However, a substantial proportion of men can experience a decline in sexual function during AS follow-up. The aim of this study was to identify predictors of declining sexual function among men on AS.

Men enrolled from 2008 to 2018 in the South Australian Prostate Cancer Clinical Outcomes Collaborative registry-a prospective clinical registry-were studied. Sexual function outcomes were measured using expanded prostate cancer index composite (EPIC-26) at baseline and 12-months postdiagnosis. Multivariable regression models adjusted for baseline score and other sociodemographic and clinical factors were applied to identify predictors of sexual function score at 12-months.

A total of 554 men were included. Variables that showed significant association with decline in sexual function score at 12-months were: having two or more biopsies after diagnosis (mean change score (MCS): -16.3, p < 0.001) compared with no biopsy, higher number of positive biopsy cores (MCS: -1.6, p = 0.004), being in older age category (above 70 vs. below 60: MCS: -16.7, p < 0.001; 65-70 vs. below 60: MCS: -9.7, p = 0.024), having had depression (MCS: -9.0, p = 0.020), and impaired physical function (MCS: -10.0, p = 0.031). Greater socioeconomic advantage (highest vs. lowest quintile: MCS: 15.7, p = 0.022) and year of diagnosis (MCS: 2.6 for every year, p < 0.001) were positively associated with 12-months sexual function score. Neither biopsy type, biopsy timing nor PSA velocity were associated with declines in sexual function.

Our findings suggest that multiple factors affected sexual function during AS. Interventions toward reducing the number of biopsies through less invasive monitory approaches, screening for physical and mental well-being, and targeted emotional support and counseling services may be helpful for men on AS.