. Author manuscript; available in PMC: 2013 May 1.

Published in final edited form as: Schizophr Res. 2012 Feb 29;137(1-3):159–165. doi: 10.1016/j.schres.2012.02.004

Table 2.

Conditional logistic regression analysis of low maternal vitamin A levels and schizophrenia and other schizophrenia spectrum disorders (SSD) in the second and third trimesters.

	Unadjusted			Adjusted

	OR	95% CI	p value	OR^a	95% CI	p value
Trimester 2	1.52	0.62, 3.72	0.36	3.05	1.06, 8.79	0.039
Trimester 3	1.19	0.50, 2.84	0.69	1.29	0.51, 3.32	0.59

As defined a priori, odds ratios (OR) represent the effect of vitamin A levels during the second, and the third, trimesters in the lowest tertile group compared to the highest (reference) tertile group on SSD risk. Second trimester analysis adjusted for maternal education and maternal age. Third trimester analysis adjusted for maternal education, maternal age, and third trimester hemoglobin