Table 4.

Relative risk of failure within the first 12 months of contraceptive use by socioeconomic characteristics of users of the pill, condom, and withdrawal in the United States: unweighted data corrected for underreporting of abortion in the 2002 NSFG

Pill users		Relative risk*	p-value	95% C.I.
Age (30+)
	20–29	1.67	0.0498	(1.33 – 4.28)
	<20	2.38	0.0036	(1.00 – 2.80)
Intention status (no more)
	Intend more or don't know	1.73	0.0081	(1.15 – 2.60)
Union status (currently married)
	Cohabiting	2.54	<.0001	(1.63 – 3.98)
	Not in union	1.93	0.0025	(1.26 – 2.95)
Parity (no births)
	1 or more births	7.94	<.0001	(4.99 – 12.64)
Condom users
Age (30+)
	<30	1.55	0.0093	(1.11 – 2.16)
Intention status (no more)
	Intend more or don't know	1.47	0.0101	(1.10 – 1.97)
Union status (not cohabiting)
	Cohabiting	1.61	0.0009	(1.22 – 2.13)
Parity (no births)
	1 or more births	2.54	<.0001	(1.88 – 3.43)
Race/Ethnicity (all other)
	Nonhispanic black	1.63	0.0001	(1.27 – 2.09)
Poverty status (200% or more)
	Less than 200%	1.91	<.0001	(1.46 – 2.49)
Withdrawal users
Intention status (no more)
	Intend more or don't know	3.12	0.0002	(1.72 – 5.63)
Union status (ever married)
	Never married	2.25	0.0005	(1.42 – 3.56)
Parity (no births)
	1 or more births	4.19	<.0001	(2.31 – 7.60)
Poverty status (200% or more)
	Less than 200%	1.94	0.0036	(1.24 – 3.02)

^*Risk relative to that for the reference group, indicated in parentheses.