Oral contraceptives, breastfeeding and the risk of developing rheumatoid arthritis: results from the Swedish EIRA study.

Ann Rheum Dis · 2017 · PMC5705848 · PMID 28818831

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In a large cohort study, Karlson et al found a decreased risk of RA among women who breast fed for more than 12 months, with a significant trend with increased duration of BF. 15 Restricting the analyses to RF positive patients, a similar reduction was found for a total BF duration of ≥24 months.

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