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. 2018 Mar 23;6:71. doi: 10.3389/fped.2018.00071

Table 1.

Description of the sample (n = 1,732).

Mean
SD
Age (years old) 6.66
2.39
n %
Group Typical 1,349 77.9
Attention deficit hyperactivity disorder 95 5.5
ASD 84 4.8
Developmental delay 15 0.9
Other neurodevelopmental disorders 83 4.8
Language-specific disorders 106 6.1

Sex Female 848 49.0
Male 884 51.0

Age of child (years old) ≤4 397 22.9
5–7 658 38.0
≥8 677 39.1

Educational level Preschool 705 40.7
Primary 1,027 59.3

Preterm Yes 323 18.6
No 1,409 81.4