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ABSTRACT: Introduction
Pregnancy losses may be associated with increased risks of dementia.Methods
We conducted a register-based cohort study in 1,243,957 women with ?1 pregnancy in Denmark in the period 1977-2015. Using Cox regression, we estimated hazard ratios (HRs) comparing risks of dementia in women with and without pregnancy losses.Results
During 21,672,433 person-years of follow-up, 261,279 women experienced a pregnancy loss, and 2188 women were diagnosed with dementia. Stillbirth was associated with an 86% increased risk of dementia overall (HR 1.86, 95% confidence interval [CI] 1.28-2.71). By contrast, miscarriage was not associated with later risk of dementia overall (single miscarriage, HR 0.99, 95% CI 0.87-1.12; recurrent miscarriages, HR 1.06, 95% CI 0.84-1.35). Adjustment for cardiovascular disease, hypertension, and diabetes did not meaningfully alter the association magnitudes.Discussion
Stillbirth and dementia may share underlying mechanisms, suggesting that a history of stillbirth should be considered when assessing dementia risk in women.
SUBMITTER: Basit S
PROVIDER: S-EPMC6495073 | biostudies-literature | 2019
REPOSITORIES: biostudies-literature