Table 2.

Continuation Rates at 12 Months by Contraceptive Method, Stratified by Age and Hazard Ratio of Risk of Discontinuation

Method	Age	n	Continuation Rate (%)	Crude Hazard Ratio [95% CI]	Adjusted Hazard Ratio [95% CI]*
LNG-IUS	14–19	330	80.6	1.44[1.08–1.92]	1.25[0.83–1.88]
	20–25	1527	86.8	0.97[0.79–1.18]	0.95[0.76–1.17]
	26 or older	1508	86.4	Ref	Ref
Copper IUD	14–19	55	75.6	1.93[1.07–3.50]	1.24[0.54–2.85]
	20–25	313	82.5	1.33[0.93–1.90]	1.25[0.85–1.85]
	26 or older	516	85.9	Ref	Ref
Implant	14–19	378	82.2	1.15[0.78–1.69]	1.12[0.59–2.11]
	20–25	532	80.1	1.28[0.90–1.83]	1.27[0.87–1.87]
	26 or older	304	84.4	Ref	Ref
DMPA	14–19	112	47.3	1.17[0.84–1.63]	1.63[0.99–2.64]
	20–25	244	57.1	0.91[0.69–1.21]	1.01[0.74–1.40]
	26 or older	201	53.4	Ref	Ref
OCPs	14–19	146	46.7	1.21[0.89–1.64]	1.21[0.78–1.87]
	20–25	385	51.6	1.04[0.81–1.34]	1.14[0.86–1.51]
	26 or older	209	53.9	Ref	Ref
Patch	14–19	21	40.9	1.00[0.49–2.01]	0.71[0.26–1.98]
	20–25	72	39.7	1.00[0.61–1.62]	0.90[0.53–1.51]
	26 or older	46	40.7	Ref	Ref
Ring	14–19	57	31.0	1.69[1.14–2.50]	1.71[1.01–2.89]
	20–25	344	52.2	1.05[0.80–1.38]	1.06[0.78–1.45]
	26 or older	172	53.1	Ref	Ref
LARC	14–19	763	81.0	1.38[1.12–1.69]	1.22[0.89–1.68]
	20–25	2372	84.7	1.10[0.94–1.28]	1.07[0.91–1.27]
	26 or older	2328	86.0	Ref	Ref
Non-LARC	14–19	336	44.0	1.25[1.04–1.50]	1.32[1.02–1.73]
	20–25	1045	52.3	1.01[0.88–1.17]	1.07[0.91–1.27]
	26 or older	628	52.6	Ref	Ref

CI, confidence interval; LNG-IUS, levonorgestrel intrauterine system; IUD, intrauterine device; DMPA, depot medroxyprogesterone acetate; OCPs, oral contraceptive pills; LARC, long-acting reversible contraceptive.

^*Adjusted for age, gravidity, and history of a sexually transmitted infection.