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Table 1 Sample demographics.

From: Paternal age increases the risk for autism in an Iranian population sample

 

Children with autism spectrum disorder

(N= 179)

Comparison cohort

(N= 549,354)

p-value

Mean paternal age

33.3

32.0

0.542

Mean maternal age

27.5

26.9

0.126

Paternal education

   

College graduate + (%)

35.6

10.9

0.000

< High school (%)

34.6

61.3

 

Maternal education

   

College graduate + (%)

30.7

7.3

0.000

< High school (%)

35.4

64.4

 

Birth order

   

First born (%)

55.3

43.6

0.003

Sex

   

Male (%)

79.9

51.6

0.000

Consanguinity (%)

   

Related parents

32.4

30.4

0.573

Urban/rural

   

Urban (%)

97

79

0.000