Table 1 Demographic and clinical variables

Demographics

 Age^a

54.0 ± 16.1

53.4 ± 16.2

−1.24^c

0.223

 Postsecondary education^b

69.0

67.2

1.82^d

0.157

ADHD Symptomatology

 Inattention^a

3.1 ± 2.9

2.8 ± 2.7

3.68^e

0.000

 Hyperactivity^a

2.1 ± 2.2

2.1 ± 2.2

0.64^e

0.534

 Impulsivity^a

2.7 ± 2.1

2.4 ± 2.0

4.74^c

0.000

Substance Abuse Measures

 ASSIST^b

2.7

6.1

34.77^d

0.000

 AUDIT^b

6.0

17.7

176.21^d

0.000

Psychiatric Symptom Measures

 GHQ-12^b

15.4

11.0

20.07^d

0.000

 Conduct disorder symptoms^b

15.7

25.1

90.53^d

0.000