IDs sample

TD sample

Χ2/t

M

SD

M

SD

Mothers’ characteristics

Educational level (max 8)

3.7

2.75

5.29

1.37

2.53*

Fathers’ characteristics

Educational level (max 8)

4.08

3.31

5.4

1.12

0.28

Children’s characteristics

Gender (% male)

71%

74%

0.05

Age (in months)

Chronological age

103.15

24.87

55.66

9.89

9.26***

Developmental age

59.26

16.24

58.31

16.05

0.22