TABLE 4—

Adjusted Probabilities of Most Versus Moderately Effective Contraception and of Implant Versus IUD Use by Age: United States, 2017–2019

Age, Years	Most Effective (26 113) vs Moderately Effective (88 167) Contraception, Probability (95% CI)	Implant (13 580) vs IUD (12 034), Probability (95% CI)
15–17	17.7 (15.1, 20.7)	78.2 (75.6, 80.6)
18–19	17.5 (14.9, 20.4)	69.5 (66.7, 72.3)
20–24	17.9 (15.3, 20.9)	59.7 (56.8, 62.6)
25–29 (Ref)	19.3 (16.6, 22.4)	51.0 (48.1, 53.8)
30–34	18.6 (16.0, 21.5)	44.7 (41.8, 47.6)
35–39	18.2 (15.7, 21.1)	38.5 (35.4, 41.7)
40–49	16.8 (14.5, 19.4)	30.4 (27.1, 33.8)

Note. CI = confidence interval; IUD = intrauterine device. Probabilities are adjusted and absolute. Moderately effective contraceptive methods are vaginal ring, patch, oral pill, and injectable. Most effective contraceptive methods are IUD and implant. Generated from the full model in Supplemental Table D (available as a supplement to the online version of this article at https://www.ajph.org). Models are adjusted for age, race/ethnicity, income, payor, provider type, Title X clinic visit status, rural clinic visit status, State Family Planning/1115 waiver status, and state Medicaid expansion status.