Table 2.

Odds ratios (ORs) of the significant predictors of multivitamin use

Variable	Total sample		African ancestry		No African ancestry
	OR	95% CI	OR	95% CI	OR	95% CI
Acute illness	0.7**	[0.5-0.9]	0.9	[0.5-1.6]	0.5**	[0.3-0.8]
Live births	0.8**	[0.7-0.96]	0.7**	[0.5-0.9]	0.9	[0.8-1.2]
Maternal age 26-35 a	1.0	[0.7-1.5]	2.4**	[1.3-4.4]	0.6*	[0.4-1.01]
Maternal age ≥36a	1.3	[0.7-2.3]	3.0**	[1.1-8.4]	1.0	[0.5-2.0]
Prenatal ultrasounds	1.2**	[1.04-1.3]	1.4**	[1.2-1.7]	1.1	[0.9-1.3]
Maternal education-Less than primary b	0.7	[0.4-1.3]	1.1	[0.4-3.0]	0.5**	[0.2-0.97]
Maternal education-Secondary b	1.9**	[1.1-3.4]	3.8**	[1.4-10.5]	1.5	[0.7-3.0]
Maternal education-University b	2.1**	[1.1-4.3]	4.7**	[1.3-16.6]	1.6	[0.6-4.0]
Other ancestry	3.4**	[1.5-7.5]	5.8*	[0.8-41.1]	3.3**	[1.3-8.3]
Pregnancy year 96 c	1.9	[0.8-4.5]	8.4**	[1.9-38.1]	0.8	[0.3-2.2]
Pregnancy year 97 c	1.9	[0.8-4.5]	8.7**	[1.9-40.5]	0.8	[0.3-2.2]
Pregnancy year 98 c	2.2*	[0.9-5.1]	4.5**	[1.02-19.6]	1.2	[0.4-3.4]
Minas Gerais d	0.3*	[0.1-1.1]	0.2**	[0.1-0.7]	0.3	[0.1-1.8]
Rio Grande do Sul d	0.1**	[0.03-0.3]	0.1**	[0.01-0.4]	0.1**	[0.02-0.3]
Wald Chi-square (df), p value	105.6 (38), <0.0001		77.2 (37), <0.001		66.5 (37), <0.01

Note: 95% Confidence Intervals (CI) of the odds Ratios (ORs) of the predictors with significant effects at p<0.05 in at least one of the three models (pooled and stratified by race) are listed in brackets.

* and ** indicate p<0.1 and <0.05 respectively.

^aReference category is maternal age between 20 and 25 years of age inclusive;

^bReference category is completed primary school;

^cReference category is year 1994;

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