Table 5 . The results of three different logistic regression models to determine the association of sociodemographic characteristics with behavioural, obstetrical, and medical risk factors of pregnancy .

Variable	Crude Odds ratio	Adjusted odds ratio	95% confidence interval	P
Behavioural risk *
Age group
≤18	0.80	0.63	0.33–1.22	0.170
19–34	0.48	0.55	0.39–0.78	0.001
≥35	Reference	Reference	----	---
Area of residence
Urban	0.76	1.39	1.07-1.80	0.012
Rural	Reference	Reference	----	---
Women’s education level
Illiterate/Primary	4.49	2.50	1.73–3.60	<0.001
Secondary	3.48	2.48	1.78–3.46	<0.001
Diploma	1.86	1.60	1.24–2.05	<0.001
College	Reference	Reference	----	---
Husband’s education level
Illiterate/Primary	5.29	3.00	2.00–4.50	<0.001
Secondary	2.78	1.74	1.28–2.38	<0.001
Diploma	1.67	1.34	1.04–1.71	0.022
College	Reference	Reference	----	---
Obstetrical risk *
Age group
≤18	0.42	0.42	0.26–0.66	<0.001
19–34	0.48	0.48	0.38–0.60	<0.001
≥35	Reference	Reference	----	---
Medical risk *
Women’s education level
Illiterate/Primary	1.84	2.50	1.73–3.60	<0.001
Secondary	1.50	2.48	1.78–3.46	<0.001
Diploma	1.13	1.60	1.24–2.05	<0.001
College	Reference	Reference	----	---
Health insurance
No	0.79	0.66	0.48–0.92	0.012
Yes	Reference	Reference	----	---
*Having at least one risk factor vs. no risk