Table 1 Basic data of all study groups and medication in the ADHD groups

Gender (m/f)

13/13

14/12

14/12

–/–/0.951^b

Age (years)

39.1 ± 9.6

38.9 ± 10.6

25.8 ± 3.1

–/21.3/0.000^c

Education^a

3.3 ± 1.1

3.1 ± 1.1

4.3 ± 0.5

–/12.4/0.000^c

Methylphenidate alone

11

6

–

2.185/–/0.139^d

Antidepressant alone

4

8

–

1.733/–/0.188^d

Methylphenidate plus antidepressant

4

6

–

0.495/–/0.482^d

No medication

7

6

–

0.103/–/0.749^d

Axis-I comorbidity

1.5 ± 1.1

1.6 ± 1.2

–

–/–/0.716^e

Axis-II comorbidity

1.5 ± 1.2

1.8 ± 1.2

–

–/–/0.350^e