Socio-demographic risk factors for unintended pregnancy among unmarried adolescent Nigerian girls

Figures & data

Table 1: Bivariate analyses of unintended pregnancy among unmarried adolescents and their socio-demographic characteristics (N = 6 951)

Characteristic	Pregnancy status		Odds ratio	95% CI
	Pregnant (n = 492) %	Not pregnant (n = 6 099) %
Adolescents age at birth^*
15	11.99	24.92	1
16	12.20	19.10	0.28	0.0845705–0.6501633
17	20.73	17.20	0.91	0.5882173–1.248399
18	35.37	23.94	1.2	0.8179082–1.425675
19	19.72	14.84	1.01	0.6818118–1.349597
Sex of household head^†
Male	90.65	79.59	1
Female	9.35	20.41	1.1	1.220849–6.011713
Age of household head^***
15–29	21.61	44.91	1
30–44	56.51	14.84	1.1	2.405217–0.511573
45–59	21.88	40.25	1.0	1.096044–8.740936
Household wealth index^***
Poor	14.14	85.86	1
Average	12.31	87.69	0.1	2.505743–0.067802
Wealthy	9.58	90.42	0.4	5.376408–3.452852
Adolescent’s Educational Attainment^†
No Education	13.54	86.46	1
Primary	12.25	87.75	0.1	0.2113683−0.0185881
Secondary	9.57	90.43	0.3	4.819327–3.026381
Higher	8.81	90.19	0.4	6.378431–3.28363
Religious Affiliation^†
Catholic	8.86	10.05	1
Pentecostal	31.95	41.31	0.13	0.26867–0.067982
Islam	56.63	46..42	0.32	1.932112–4.563914
Traditionalist	1.82	1.53	0.29	0.0021878–5.98538
Others (Christians)	0.12	0.15	0.0	1.113184–9.643908
Type of place of residence^†
Urban	26.84	32.40	1
Rural	73.16	67.60	0.26	0.185518–3.496459

Source: calculated from the 2008 Nigeria demographic and health survey:

^* p < 0.05.

^*** = statistically highly significant

^† p < 0.01.

Table 2: Adjusted odds ratios from logistic regression of unintended adolescent births and socio-demographic characteristics of adolescents with unintended pregnancy and those of non-pregnant girls (n = 492)

Characteristics	Odds ratio	95% CI
Age of household head*
15–29	1
30–44	0.53	0.4209848–0.6776125
45–59	0.21	0.1542932–0.3012827
Adolescents age*
15	1
16	1.2	0.8564493–1.888038
17	2.03	1.424112–2.9133
18	2.5	1.732442–3.299725
19	2.4	1.690283–3.470652
Sex of household head*
Male	1
Female	0.56	0.3920097–0.807327
Adolescent’s educational attainment
No education	1
Primary	0.82	0.604124–1.13942
Secondary/Higher	0.38	0.2629758–0.5653821
Type of place of residence
Urban	1
Rural	1.1	0.7316658–1.356944

Source: Calculated from the 2008 Nigeria Demographic and Health Survey:

* p < 0.01.