Table 2 Cut-off, number of children above cut-off, mean ± SD (independent t-test) for SDQ (subscales, total difficulties scale, supplement) for 151 children assessed by parents and preschool teachers

SDQ Total difficulties scale

13/11

88/99

14.0 ± 6.5

13.2 ± 6.2

SDQ Hyperactivity^a

6/5

75/104

5.7 ± 2.9

5.7 ± 2.9

SDQ Conduct^a

4/3

31/76

3.6 ± 2.4

3.0 ± 2.6*

SDQ Peer

3/3

66/86

2.5 ± 2.0

3.0 ± 2.1*

SDQ Emotional

3/3

52/34

2.2 ± 2.3

1.6 ± 1.8**

SDQ Prosocial

6/4

102/90

6.4 ± 2.5

4.6 ± 3.1**

SDQ Supplement^b,c

1/1

128/132

2.9 ± 2.4

2.4 ± 2.3