Table 1.

Factors affecting enrolment into health insurance in 33,500 children between 1 month and 5 years of age

			Crude analysis		Adjusted analysis
Variable	Category	N	Hazard ratio	p	Hazard ratio	p
Residence	Rural	23,691	1		1
	Nouna (town)	9,809	1.60	<0.0001	1.25	0.0007
Ethnicity	Dafing	12,539	1		1
	Bwaba	7,262	0.82	0.0026	0.85	0.073
	Mossi	6,675	0.61	<0.0001	0.58	<0.0001
	Peulh	3,350	0.93	0.37	0.89	0.17
	Samo	2,687	0.87	0.16	0.69	0.0002
	Other	987	1.40	0.011	1.00	0.97
Religion	Muslim	22,157	1		1
	Catholic	8,448	1.03	0.59	1.07	0.39
	Protestant	1,190	1.18	0.19	1.31	0.053
	Animist/Other	1,705	0.51	<0.0001	0.69	0.029
Distance	≤5 km	20,362a	1		1
	>5 km	13,138a	0.39	<0.0001	0.57	<0.0001
Socioeconomic status	Q5 (least poor)	6,897	1		1
	Q4	6,048	0.73	<0.0001	0.73	<0.0001
	Q3	4,831	0.74	<0.0001	0.69	<0.0001
	Q2	4,183	0.49	<0.0001	0.49	<0.0001
	Q1 (poorest)	3,611	0.41	<0.0001	0.40	<0.0001
	Missing	7,930	0.40	<0.0001	0.43	<0.0001
Education of mother	None	20,637	1		1
	Basic	3,007	1.72	<0.0001	1.19	0.024
	Secondary	930	2.40	<0.0001	1.16	0.26
	Missing	8,926	0.88	0.59	1.07	0.48
Education of father	None	18,003	1		1
	Basic	4,746	2.03	<0.0001	1.69	<0.0001
	Secondary	1,183	4.04	<0.0001	1.87	<0.0001
	Missing	9,568	0.99	0.91	1.00	0.99
Age of father	20–40	21,460	1		1
	<20	535	0.83	0.37	1.03	0.90
	41+	6,791	0.83	0.0036	0.92	0.26
	Missing	4,714	0.84	0.039	0.93	0.58
Birth year	Before 2006	18,690	1.18		1.12
	2006 and after	14,810	(per year)	<0.0001	(per year)	<0.0001
Mother insured at birth	Not insured	33,029	1		1
	Insured	471	23.65	<0.0001	13.81	<0.0001
Number of older siblings	1–3	14,592	1		1
	None	8,849	0.90	0.077	0.94	0.33
	4 or more	7,734	0.77	<0.0001	0.88	0.058
	Missing	2,325	0.90	0.33	1.06	0.72
Spacing to next younger sibling	18+ months or none	32,478	1		1
	<18 months	1,022	0.78	0.15	0.69	0.032

The following variables showed no effects: sex, season of birth, twin birth, household size, age of mother, or previous death of mother.

^aFor frequency measures, distance measured in 2005.