Abstract
AbstractPurpose: Postmenopausal women have a higher prevalence of cataract than similar‐aged men. This study aimed to evaluate the effects of menopausal hormone therapy on lens opacity in postmenopausal women.Methods: This retrospective cohort study analysed population‐based health insurance data in South Korea collected from 2002 to 2019. To determine the risk factors associated with cataract, postmenopausal women (N = 2 506 271) were grouped according to postmenopausal hormone therapy use. The treatment group was further divided into the following subgroups: tibolone, combined oestrogen plus progestin by manufacturer, oral oestrogen, combined oestrogen plus progestin by physician, and topical oestrogen groups. The main outcome measure was the prevalence of cataract.Results: The control group comprised 463 151 postmenopausal women who had never used menopausal hormone therapy after menopause, while the treatment group included 228 033 postmenopausal women who had used menopausal hormone therapy continuously for at least 6 months. The treatment group had a higher incidence of cataract than the control group based on Cox proportional hazards ratio analysis. Low socioeconomic status and high parity were identified as risk factors for cataract, and reduced risk of cataract was associated with living in rural areas and drinking.Conclusions: Women undergoing postmenopausal hormone therapy, including tibolone, had a higher incidence of cataract than those who were not. Old age, low socioeconomic status, and high parity were risk factors for cataract. Our findings may help physicians identify postmenopausal women at a greater risk of developing cataract.
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