Table 3.

Adjusted prevalence of modern contraceptive use and RII (95% CI) by each measure of SEP

		Prevalence (%)		RII (95% CI)		Difference
		Urban	Rural	Urban	Rural	p-value
Current non-use of contraception among women in union (married/cohabiting) and single sexually active		23.7	28.2	N = 15147	N = 4876	<0.001
Household wealth (HWI)	Richest	19.8	13.7
	Fourth	21.0	23.7
	Middle	23.7	17.5	2.84 (2.41-3.35)	4.6 (3.06-6.79)	<0.001
	Second	28.0	23.4
	Poorest	30.4	33.5
Physical capital	Richest	21.0	16.9
	Fourth	21.1	20.3
	Middle	22.5	19.6	2.64 (2.26-3.07)	3.96 (2.82-5.55)	<0.001
	Second	28.0	26.7
	Poorest	29.6	33.9
Public capital	Richest	a	a
	Fourth	22.3	17.7
	Third	22.3	21.2	1.84 (1.56-2.17)	2.01 (1.35-2.97)	0.09
	Second	26.2	26.9
	Poorest	30.8	29.7
Human capital	University	23.0	20.8
	Secondary	22.9	24.1
	Primary	25.3	28.6	1.44 (1.24-1.67)	1.64 (1.14-2.37)	<0.001
	None	25.2	51.4
Never use of contraception among ever-sexually active women		8.9	17.2	N = 25231	N = 7552	<0.001
Household wealth (HWI)	Richest	4.9	3.8
	Fourth	7.3	7.2
	Middle	9.0	8.0	7.14 (5.94-8.59)	23.5 [14.6-38.1]	<0.001
	Second	10.9	12.5
	Poorest	18.5	22.8
Physical capital	Richest	5.3	5.3
	Fourth	7.4	6.9
	Middle	8.6	9.0	5.81 (4.89-6.91)	19.63 [13.13-29.35]	<0.001
	Second	10.6	14.5
	Poorest	15.2	24.1
Public capital	Richest	a	a
	Fourth	8.3	7.3
	Third	7.3	9.1	2.47 (2.04-2.99)	7.72 [4.93-12.10]	<0.001
	Second	10.6	12.3
	Poorest	15.4	20.2
Human capital	University	6.3	9.1
	Secondary	8.3	12.0
	Primary	12.3	19.7	4.83 (4.04-5.78)	7.98 (5.27-12.10)	<0.001
	None	22.3	43.8

a. Empty quintile []. Large confidence intervals possibly due to uneven distribution of women between quintile groups see Table S3 additional file 1.

Note: Prevalence and RII adjusted for age in years, marital status and number of children ever born by place of residence.