Population-based Comparison Study on the Costs of Stroke Care for Women with Dysmenorrhea

Abstract

Background No study has investigated costs of stroke care for women with dysmenorrhea and stroke. This study compared types of stroke and costs of stroke care between women with and without dysmenorrhea, using the National Health Insurance Research Database of Taiwan. Methods From the insurance claims data, we identified women aged 15–44 to establish study cohorts with and without dysmenorrhea, frequency matched by age, with same sample size of 66048. Incidence of stroke and costs by stroke subtype were compared between the two cohorts at the end of follow-up. Results The incidence of stroke was 1.3-fold greater in the dysmenorrhea cohort than in comparisons. Proportionally, hemorrhagic stroke (HS) decreased with age, whereas ischemic stroke (IS) increased with age in both cohorts. Compared to comparisons, dysmenorrhea women had lower proportions of both HS (16.6% vs. 21.3%) and IS (19.8 vs. 20.1%), whereas dysmenorrhea women had higher proportion of transient cerebral ischemia (TIA) (31.3 vs. 24.2%). The average HS care and IS care cost ratios were 4.1 (3254/789, USD) for dysmenorrhea women, and 3.3-fold (3870/1171, USD) for comparisons. Hospitalization rate was lower in the dysmenorrhea than in comparisons (18.0 vs. 23.4%). Dysmenorrhea was associated with an increased risk of HS hospitalized (adjusted odds ratio (aOR) = 1.26, 95% confidence interval (CI) 0.71–2.23), but a lowered risk for IS (aOR = 0.48, 95% CI 0.21–0.69). Average costs for inpatient care, intensive care units, emergency and outpatient visits for dysmenorrheal women were all less than that for comparisons, but not significant. Conclusion The overall incidence of stroke was higher in dysmenorrheal women than in comparisons due to a higher proportion of TIA, but not HS and IS. However, costs for stroke care were slightly lower for dysmenorrhea women than for comparisons.