Table 4.

Levels of indoor CO higher associated with SGA in Peruvians Andean women. (subsample n=72, 36 cases, 36 controls)

Indoor CO (ppm) (tertiles)	OR crude	p-value	OR adjusted*	p-value	95% Conf. Int.
0.03 to < 1.05	1.0		1.0
1.05 – 3.81	1.83	0.31	1.16	0.82	0.32 - 4.26
≥ 3.82	4.25	0.02	3.53	0.06	0.94 - 13.23

^*Logistic regression adjusted for education level and parity. Test for trend (continuous CO) was 0.02