Objective The objective of the study was to determine if postpartum contraceptive choices by primiparous women differ by ethnicity. Study design Retrospective nested cohort study analyzing women's characteristics and contraceptive choice. Results Of 652 participants, 312 (47.8%) were Hispanic, 287 (44.0%) were non-Hispanic white, and 53 (8.1%) were American Indian (AI). In multivariate analysis, depot medroxyprogesterone acetate (DMPA) and intrauterine device (IUD)/implant choice was related to AI [DMPA: odds ratio (OR) 15.28, confidence interval (CI) 4.49-52.04; IUD/implant: OR 0.46, CI 0.22-0.92] and Hispanic (DMPA: OR 3.44, CI 1.12-10.58) ethnicity. Conclusion DMPA use was higher among Hispanic and AI women and IUD/implant use lower in AI women compared to non-Hispanic white women.
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