Trends in Birth Rates after Elimination of Cost Sharing for Contraception by the Patient Protection and Affordable Care Act

Abstract

Importance: Reducing out-of-pocket costs is associated with improved patterns of contraception use. It is unknown whether reducing out-of-pocket costs is associated with fewer births. Objective: To evaluate changes in birth rates by income level among commercially insured women before (2008-2013) and after (2014-2018) the elimination of cost sharing for contraception under the Patient Protection and Affordable Care Act (ACA). Design, Setting, and Participants: This cross-sectional study used data from Clinformatics Data Mart database from January 1, 2008, to December 31, 2018, for women aged 15 to 45 years who were enrolled in an employer-based health plan and had pregnancy benefits for at least 1 year. Women without household income information and women with evidence of having undergone a hysterectomy were excluded. Exposure: Section 2713 of the ACA. Main Outcomes and Measures: The primary outcome was the proportion of reproductive-aged women with a live birth by year (measured yearly from 2008 to 2018 [11 time points]) within 3 income categories. The secondary outcome was the distribution of contraceptive method fills in 3 categories by year: (1) most effective methods (long-acting reversible contraception or sterilization), (2) moderately effective methods (pill, patch, ring, and injectable), and (3) no prescription or surgical method. Results: The analytic sample included 4590989 women (mean [SD] age; 30.8 [9.1] years in 2013; 3069053 White [66.9%]) enrolled in 47721 health plans. A total of 500898 participants (40.8%) resided in households with incomes less than 400% of the federal poverty level in 2013. In all 3 years (2008, 2013, and 2018), women in the lowest income category were younger than women in the other income groups (median range, 21-22 years vs 30-34 years) and in households with a higher median number of dependents (9-10 vs 2-4). There was an associated decrease in births in all income groups in the period after the elimination of out-of-pocket costs. The estimated probability of birth decreased most precipitously among women in the lowest income group from 8.0% (95% CI, 7.4%-8.5%) in 2014 to 6.2% (95% CI, 5.7%-6.7%) in 2018, representing a 22.2% decrease (P