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Table 2 Association between oral contraceptive use and intracranial meningioma in women

From: Hormonal exposures and the risk of intracranial meningioma in women: a population-based case-control study

Exposure* Cases n Controls n OR (95% CI)†
Oral contraception (O C)
Never 48 103 Referent
Past 90 176 1.5 (0.8 – 2.7)
Current use on reference date 5 7 2.5 (0.5 – 12.6)
Years of OC use
Never 48 103 Referent
Up to 5 years 49 90 1.5 (0.8 – 3.0)
More than 5 years 46 93 1.4 (0.7 – 2.7)
First OC exposure relative to reference date
Never 48 103 Referent
1–9 years before 7 15 1.6 (0.3 – 7.5)
10 or more years before 88 168 1.5 (0.8 – 2.7)
  1. * Reported exposure before reference date, which for a case and her two matched controls was the date the case had surgery for her meningioma.
  2. † Odds ratio (OR) and 95% confidence intervals (CI) estimated from multivariable conditional logistic regression including continuous age and three categories of education (high school or less, some college or trade school, and college graduate or graduate school) as confounding variables. None of the tests for linear trend was significant.