Table 1 Sociodemographic and individual characteristics of participants by peer victimisation at 13 years. Values are means (standard deviations) unless stated otherwise

 Male (%)

50.5

47.1

47.2

0.03

 Childhood emotional problems

1.4 (1.6)

1.5 (1.7)

1.6 (1.7)

< 0.001

 Childhood conduct problems

1.4 (1.4)

1.5 (1.4)

1.7 (1.5)

< 0.001

 Adolescent depressive symptoms

2.5 (2.6)

4.2 (3.5)

7.2 (5.0)

< 0.001

 Adolescent bullying perpetration

0.2 (0.7)

0.8 (1.4)

2.1 (2.4)

< 0.001

 Lower maternal social class, (%)

21.6

20.0

18.8

< 0.01

 Maternal education: O levels or less (%)

58.5

54.9

54.4

0.04

 Maternal depression

5.3 (3.7)

5.8 (3.9)

6.1 (3.8)

< 0.001

 Maltreatment (%)

2.0

3.0

5.1

< 0.001