Efficacy of interventions to manage sexual dysfunction in women with cancer: a systematic review.

Abstract

Cancer and its treatment negatively affect female sexual health and function. The prevalence of female sexual dysfunction after cancer is between 33% and 43%. Numerous studies have addressed treatment options for sexual dysfunction in women with cancer, but it still remains a challenge to select the most efficacious option for patients. To compile and appraise recent evidence of any interventions for managing sexual dysfunction in female cancer survivors. A literature search of the electronic databases MEDLINE, EMBASE, PsycINFO, and Cochrane Central Register of Controlled Trials (January 2011 to February 2021) was conducted using general search terms of "women", "cancer", "intervention", "sexual dysfunction". We included randomized controlled trials (RCTs) and uncontrolled before-after studies that evaluated the efficacy of intervention for female sexual dysfunction in women with history of cancer. Methodological quality of studies was assessed using Risk of Bias (RoB) 2.0 for RCTs and National Institutes of Health (NIH) assessment tools for uncontrolled before-after studies. Thirty-six studies were included for qualitative synthesis (14 RCTs (n = 1284), 17 uncontrolled trials (n = 589), and 5 cohort studies (n = 497). Only four studies were at low risk of bias. Topical interventions (vaginal gels or creams) were able to alleviate vaginal dryness and dyspareunia, with intravaginal dehydroepiandrosterone (DHEA) (6.5 mg) gel showing evidence of improved sexual function. Evidence for estriol-lactobacilli vaginal tablets was unreliable due to a small-scale study. Psychoeducational therapy (internet-based cognitive behavioral therapy [CBT]) studies typically were at high risk of bias, but all displayed significant improvements of sexual function. Both laser therapy (fractional CO2 and erbium) and multimodal approach studies were at concerning risk of bias, although suggesting beneficial effects on sexual function. The most reliable evidence for improvement was from a study of DHEA vaginal gel, but in general, gels or creams were useful in reducing dyspareunia. Pharmacological, psychoeducational, laser therapy, and multimodal approaches demonstrated potential in managing cancer-related sexual issues, but most were small in size (10-70 participants), with moderate to high risk of bias. Therefore, large-scale, double-blind, RCTs with long-period follow-up, and at low risk of bias are needed to show efficacy for these interventions.