Table 5.

Multivariate analyses of variables associated with autism spectrum disorder.

Variable	Odds ratio	95% Confidence Interval		p
		lower	upper
Nulliparity	1.56	0.66	3.66	0.308
Maternal smoking during pregnancy	2.38	0.92	6.18	0.074
Positive family history for autism	3.78	1.29	11.1	0.015
Cesarean delivery	1.59	0.64	3.99	0.322
The history of seizure	6.05	1.67	21.9	0.006
Neonatal jaundice	1.21	0.34	4.33	0.769
Severe infection in pregnancy	2.43	0.76	7.77	0.134