Table 4.

Results of univariate and multivariate logistic regression analyses of variables related to the periconceptional intake of folic acid supplements.

Dependent variable: periconceptional intake of folic acid supplements	Univariate		Multivariate
	OR (95% CI)	P -value	OR (95% CI)	P -value
Knowledge
Overall knowledge of health and nutrition (standardized score)	1.119 (0.974–1.285)	0.113	1.052 (0.857–1.291)	0.630
Knew correct time to take folic acid (1 = yes)	1.263 (0.891–1.791)	0.189	1.023 (0.630–1.661)	0.927
Awareness of folic acid policy (1 = yes)	1.604 (1.166–2.206)	0.004	1.912 (1.326–2.758)	0.001
Characteristics of respondents
Age (<28 as reference)	1.047 (0.793–1.382)	0.748	1.218 (0.857–1.732)	0.271
Years of education (≤9 years as reference)	1.288 (0.974–1.703)	0.076	1.069 (0.750–1.525)	0.712
Employment status (1 = employed)	1.037 (0.758–1.418)	0.821	0.844 (0.581–1.225)	0.372
Pregnancy order (1 = first)	2.067 (1.543–2.768)	<0.001	1.636 (1.135–2.358)	0.008
Pregnancy intention (1 = intended)	9.558 (6.679–13.680)	<0.001	9.742 (6.687–14.193)	<0.001
BMI (BMI <25 as reference)	1.091 (0.828–1.436)	0.537
25 ≤ BMI < 30	0.927 (0.698–1.232)	0.603	0.944 (0.666–1.338)	0.746
BMI ≥ 30	0.965 (0.636–1.463)	0.867	1.023 (0.620–1.688)	0.928
Self-reported health status (1 = excellent)	1.145 (0.845–1.550)	0.383	1.030 (0.716–1.481)	0.875
Living together with husband (1 = yes)	1.260 (0.942–1.685)	0.119	1.017 (0.725–1.427)	0.923
Family asset in lowest 25% (1 = yes)	0.778 (0.562–1.079)	0.133	0.874 (0.588–1.299)	0.505
Officially registered as poverty-stricken household (1 = yes)	0.724 (0.482–1.087)	0.120	0.615 (0.396–0.954)	0.030
Region (1 = north)	1.123 (0.850–1.483)	0.415	1.135 (0.816–1.579)	0.453

95% CI, 95% confidence intervals.