Hormone therapy and risk of cardiovascular outcomes and mortality in women treated with statins

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Abstract

Objective

This work aims to study the effects of hormone therapy (HT) on the risk of cardiovascular outcomes and all-cause mortality in women treated with statins.

Methods

We included women aged 40 to 74 years and living in Sweden who filled a first statin prescription between 2006 and 2007. Women were categorized as HT users or as nonusers. Information on dispensed drugs, comorbidity, cardiovascular outcomes, and all-cause mortality was obtained from national health registers.

Results

A total of 40,958 statin users—2,862 (7%) HT users and 38,096 nonusers—were followed for a mean of 4.0 years. In total, 70% of the women used statins as primary prevention. Among HT users, there were five cardiovascular deaths per 10,000 person-years. The corresponding rate among nonusers was 18, which yielded a hazard ratio of 0.38 (95% CI, 0.12-1.19). The all-cause mortality rates were 33 and 87, respectively, and the hazard ratio was 0.53 (95% CI, 0.34-0.81). There were no associations with cardiovascular events. A similar pattern was found for both primary and secondary prevention.

Conclusions

HT is associated with a reduced risk of all-cause mortality in women treated with statins. Although confounding factors, such as lifestyle and disease severity, might have influenced the results, HT does not seem to be detrimental to statin-treated women.

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