Use of Estrogen Therapy After Surgical Menopause in Women Who Are Premenopausal

OBJECTIVE: To examine the use of estrogen therapy (ET) and patterns of follow-up evaluation for sequelae of estrogen deprivation among women who were premenopausal who underwent bilateral salpingo-oophorectomy (BSO) for benign gynecologic diseases. METHODS: The IBM Watson Health MarketScan Research Databases were used to identify women between age 18 and 50 years who underwent BSO from 2008 to 2019. Estrogen therapy was defined as any prescription of estrogen filled from 6 weeks before BSO to 36 months after BSO. Patterns of follow-up testing including bone mineral density and lipid testing were examined. RESULTS: We identified a total of 61,980 women who underwent BSO for benign indications. Overall, 64.5% (95% CI 64.1-64.9%) of women received ET. The rate of ET use within 36 months of surgery declined from a peak of 69.5% in 2008 to 58.2% in 2016. The median duration of continuous ET was 5.3 months. Estrogen therapy use declined with increasing age. The cumulative rate of ET use at 36 months after surgery was 79.1% (95% CI 76.9-81.1) in those aged 18-29 years, 75.9% (95% CI 74.5-77.3%) in those aged 30-34 years, 70.2% (95% CI 69.1-71.2%) in those aged 35-39 years, 66.1% (95% CI 65.3-66.9%) in those aged 40-44 years, and 60.0% (95% CI 59.4-60.6%) in those aged 45-50 years. In a multivariable model, women who underwent surgery more recently and those with medical comorbidities were less likely to receive ET, whereas younger women, those with Medicaid insurance, those outside of the northeast, and those who underwent concurrent hysterectomy were more likely to receive ET. CONCLUSION: Estrogen therapy use in women who are premenopausal who underwent BSO for benign gynecologic diseases has declined substantially over the past decade.