Table 3. Sociodemographic and medical factors associated with pregnancy rates among all women in the efficacy population and among women who reported no further acts of UPI.

	All women in the efficacy population (n=2173)^a					Women who did not report further acts of UPI (n=2044)

		Observed PR, % (95% CI)	p	Adjusted OR^b	p	Observed PR, % (95% CI)	p	Adjusted OR^b	p
Age (years)	<25	1.9% (1.3–2.8)	.87			1.8% (1.1–2.6)	.59	1
Age (years)	25–34	1.8% (1.0–3.0)				1.4% (0.7–2.5)
BMI (kg/m²)	<30	1.6% (1.1–2.3)	.08	1	.04	1.3% (0.9–2.0)	.05	1	.04
BMI (kg/m²)	>30	3.1% (1.6–5.5)		2.1 (1.0–4.3)		3.0% (1.4–5.4)		2.2 (1.1–4.7)
Weight	≤85 kg (187 lbs)	1.6% (1.1–2.3)	.06	1	.03	1.4% (0.9–2.0)	.04	1	.03
Weight	>85 kg (187 lbs)	3.4% (1.6–6.1)		2.2 (1.1–4.6)		3.1% (1.4–5.9)		2.3 (1.1–5.1)
Race	White	2.0% (1.3–2.9)	.19			1.9% (1.3–2.8)	.39	1
	Black/African American	2.3% (1.1–4.2)				1.5% (0.5–3.2)
	Asian	2.4% (0.1–12.9)				0% (0.0–1.0)
	Other	0.4% (0.0–2.2)				0.4% (0.0–2.3)
Ever pregnant	Yes No	2.4% (1.6–3.6) 1.4% (0.8–2.2)	.08			2.1% (1.3–3.2) 1.2% (0.6–2.0)	.11
Smoking	Current	1.9% (1.2–2.7)	1			1.6% (1.0–2.4)	1.0
Smoking	None or former	1.9% (1.0–3.2)				1.6% (0.8–2.9)
Other acts of unprotected sex in the cycle before EC intake	Yes	1.3% (0.4–3.4)	.65			1.1% (0.2–3.2)	.61
Other acts of unprotected sex in the cycle before EC intake	No	2.0% (1.4 –2.7)				1.7% (1.1–2.4)
Further UPI after EC intake	Yes	6.2% (2.7–11.7)		4.3 (1.9–9.5)	<.001
Further UPI after EC intake	No	1.6% (1.1–2.3)	.002	1
Reasons for requesting EC	No method	1.8% (1.2–2.6)	.73			1.9% (0.9–3.3)	.56
Reasons for requesting EC	Condom failure or other error in contraceptive use	2.1% (1.1–3.5)				1.5% (0.9–2.3)
Hours since UPI	0–24	1.6% (0.5–3.7)	.91			1.7 % (0.5–3.8)	.81
	>24–48	2.1% (0.8–4.2)				1.3% (0.4–3.3)
	>48–72	2.2% (1.3–3.3)				2.1% (1.2–3.3)
	>72–96	1.8% (0.8–3.4)				1.2% (0.4–2.7)
	>96–120	1.0% (0.1–3.7)				1.1% (0.1–3.9)

PR, pregnancy rates.

Excludes 10 women who had missing data on weight (n=2) or UPI after UPA intake (n=8).

Adjusted OR; results from logistic regression models. These multivariate models include either the variable BMI or the variable weight. The adjusted OR for further acts of intercourse is 4.2 (1.9–9.4) (not shown) when controlling for weight and 4.3 (1.9–9.5) (shown) when controlling for BMI.