Table 4. Multiple lLogistic Regression Analysis of Factors Associated with Initiation of Very Effective Contraception and Pregnancy.

Characteristic	Initiation of Very Effective Contraception N=2,264	P value	Early Pregnancy N=1,104	P value	Late Pregnancy N=952	P value
	aOR (95%CI)		aOR (95% CI)		aOR (95% CI)
Age group (years)
15-18	0.80 (0.68–0.94)	.007	0.61 (0.49 - 0.76)	<.001	0.72 (0.56 – 0.91)	.007
19-24	ref		ref		ref
25-29	1.03 (0.91 – 1.17)	.60	1.17 (0.99 – 1.37)	.06	1.12 (0.95 – 1.33)	.18
30-39	1.35 (1.21 – 1.52)	<.001	1.04 (0.89 – 1.22)	.62	0.99 (0.84 – 1.18)	.92
40-45	1.70 (1.38 – 2.07)	<.001	0.59 (0.40 – 0.84)	.005	0.44 (0.27 – 0.68)	<.001
Race/ethnicity
Hispanic	1.05 (0.94 – 1.18)	.39	1.62 (1.38 -1.91)	<.001	1.77 (1.47–2.13)	<.001
African-American	0.96 (0.84 – 1.09)	.53	1.83 (1.53 - 2.18)	<.001	2.53 (2.09 – 3.07)	<.001
White	ref		ref		ref
Asian/PI	0.62 (0.53 – 0.73)	<.001	0.98 (0.79 – 1.21)	.85	1.05 (0.82 – 1.34)	.69
Multiracial/Other	0.88 (0.74 – 1.06)	.18	0.83 (0.62 – 1.09)	.20	0.87 (0.62 – 1.20)	.41
Low income residence**	1.06 (0.93 – 1.20)	.39	1.10 (0.93 - 1.30)	.25	0.91 (0.76 - 1.09	.32
Prior contraception dispensed*	0.92 (0.84– 1.01)	.09	0.91 (0.80 – 1.03)	.12	0.97 (0.85 – 1.11)	.64
Live birth*	3.5 (3.16 – 3.96)	<.001	0.83 (0.67 – 1.02)	.09	1.41 (1.12 – 1.66)	.002
Abortion*	1.66 (1.42– 1.92)	<.001	1.34 (1.09 – 1.64)	.004	2.41 (2.00 – 2.89)	<.001
Access route
Office visit	ref		ref		ref
Call center	1.02 (0.93 – 1.13)	.66	0.82 (0.72–0.94)	.004	1.37 (1.16 – 1.60)	<.001

^±Adjusted odds ratio – models included age, race/ethnicity, and low-income residence (yes/no) at index date, contraception dispensed (yes/no), live birth (yes/no), and abortion (yes/no) in the 12 prior to the index date*, and access route. Estimates in boldface significance level p≤0.05.

^*Contraception dispensed, live birth, or abortion in the 12 months prior to accessing emergency contraception.

^**Residence in census tract with 20% of incomes below Federal poverty level