Table 1 Sample characteristics at baseline and lifetime exposure through the 2-year follow-up.

Age (years)

9.93

0.63

Parental educational attainment (years)

18.2

1.7

N

%

Male

2721

53.1

 <$5000

28

0.6

 $5000-$11,999

34

0.7

 $12,000-$15,999

30

0.6

 $16,000-$24,999

78

1.6

 $25,000-$34,999

127

2.6

 $35,000-$49,999

268

5.5

 $50,000-$74,999

668

13.6

 $75,000-$99,999

841

17.1

 $100,000-$199,999

2058

41.9

 ≥ $200,000

780

15.9

Lifetime exposure through the 2-year follow-up

n

%

 Physical abuse

38

0.7

 Emotional abuse

52

1.0

 Sexual abuse

126

2.5

 Physical neglect

962

18.8

 Emotional neglect

118

2.3

 Bullying

1486

29.0

 Winter birth

1571

30.7

 Hearing impairment

365

7.1

 Cannabis use

8

0.2