. Author manuscript; available in PMC: 2010 Jan 1.

Published in final edited form as: Int J Public Health. 2009;54(2):78–87. doi: 10.1007/s00038-009-8103-8

Table A3.

Odds ratios (ORs) of the significant predictors of first trimester use of multivitamins and folic acid supplements

Variable name	Multivitamins		Folic acid supplements
Variable name	OR	95% CI	OR	95% CI
Live births	0.8^**	[0.6-0.99]	0.7^**	[0.6-0.9]
Prenatal visits	1.1	[0.98-1.2]	1.1^**	[1.03-1.2]
Prenatal ultrasounds	1.2^**	[1.1-1.4]	1.2^**	[1.03-1.3]
Other ancestry	4.4^**	[1.8-10.8]	2.7^**	[1.2-6.4]
Rio Grande do Sul ^a	0.1^**	[0.02-0.4]	0.1^**	[0.03-0.5]
Wald Chi-square (df), p value	77.0 (38), <0.001		78.6 (38), <0.001

Note: 95% Confidence Intervals (CI) of odds ratios (ORs) of the significant predictors of first trimester use of multivitamins and/or use of folic acid supplements at p<0.05 are listed in brackets.

^**

indicates p <0.05.

Reference category is the state of Sao Paulo. Goodness of fit of the whole model including all the model covariates was evaluated by a Wald chi-square test for the significance of regression coefficients.