Table 5. Analysis of risk factors of male autism.

Variable	β	P	OR	95% CI
Exposure to cigarette smoking	1.823	0.006	6.191	1.678–22.838
Living in the countryside during pregnancy	2.848	0.011	17.251	1.899–156.745
Perinatal hypoxia	3.660	0.005	38.859	2.944–512.930
Feeding difficulties	2.508	0.001	12.284	2.768–54.507