Table 1 Means and standard deviations of the primary variables in the study

Age

14.72

0.84

14.67

0.90

− 0.54

SES

4.57

1.21

4.61

1.55

0.28

Peer victimization

1.60

0.48

1.63

0.47

0.65

Polygenic dopamine composite

1.76

0.81

1.70

0.79

− 0.71

Emotion dysregulation

2.63

0.52

2.53

0.45

− 2.10^a

Externalizing problems

1.34

0.32

1.51

0.40

4.84^b

COMT

Val158Met

Val/Val (2)

52.3

103

55.1

108

–

Val/Met (1)

42.1

83

39.3

77

–

Met/Met (0)

5.6

11

5.6

11

–

DRD2

-141C Ins/Del

Del/Del (2)

2.0

4

0.5

1

–

Del/Ins (1)

25.4

50

19.9

39

–

Ins/Ins (0)

72.6

143

79.6

156

–