Table 1 Mental retardation categories based on ICD - 10 diagnostic criteria and total difficulties and pro-social scores on SDQ

F 70

Mild

50 - 70

60

9 - 11

4 (9.1)

18.25 ± 8.85

2.25 ± 1.71

F 71

Moderate

35 - 49

42

6 - 8

27 (61.4)

13.89 ± 5.13

7.04 ± 2.39

F 72

Severe

20 - 34

27

3 - 5

11 (25.0)

11.73 ± 5.67

6.64 ± 2.25

F 73

Profound

0 - 20

10

0 - 2

2 (4.5)

12.50 ± 3.53

8.50 ± 2.12