Oral contraceptives and other risk factors for gallbladder disease

@article{Strom1986OralCA,
  title={Oral contraceptives and other risk factors for gallbladder disease},
  author={Brian L. Strom and R N Tamragouri and M. Lee Morse and Eric L. Lazar and Suzanne L. West and Paul D. Stolley and Judith K Jones},
  journal={Clinical Pharmacology \& Therapeutics},
  year={1986},
  volume={39}
}
Prior studies of the association between oral contraceptives (OCs) and gallbladder disease (GBD) have yielded conflicting results. To clarify this association, a retrospective (historical) cohort study was performed on a very large data base including 1980 and 1981 Medicaid billing data from the states of Michigan and Minnesota in which 138,943 users of OCs were compared with 341,478 nonusers. The crude relative risk (RR) and 95% confidence interval (CI) for symptomatic GBD resulting in medical… 

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