Table 1.

Comparison of quantitative variables in two groups of children with autism and non-autism

Variables	Levine test	Significance level	t	df	P
Mother’s age at delivery	0.003	0.959	−2.482	98	0.015
Father’s age at delivery	0.015	0.902	−3.211	98	0.002
Gestational age at delivery	0.038	0.845	2.396	98	0.018
The interval between pregnancies	4.497	0.036	−1.665	98	0.099
Duration of hospitalization	2.355	0.492	1.845	98	0.001