Table 1.

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

	ADHD-combined type	ADHD-predominantly inattentive type	Healthy controls	Chi-square/F/p
Gender (m/f)	13/13	14/12	14/12	–/–/0.951b
Age (years)	39.1 ± 9.6	38.9 ± 10.6	25.8 ± 3.1	–/21.3/0.000c
Educationa	3.3 ± 1.1	3.1 ± 1.1	4.3 ± 0.5	–/12.4/0.000c
Methylphenidate alone	11	6	–	2.185/–/0.139d
Antidepressant alone	4	8	–	1.733/–/0.188d
Methylphenidate plus antidepressant	4	6	–	0.495/–/0.482d
No medication	7	6	–	0.103/–/0.749d
Axis-I comorbidity	1.5 ± 1.1	1.6 ± 1.2	–	–/–/0.716e
Axis-II comorbidity	1.5 ± 1.2	1.8 ± 1.2	–	–/–/0.350e

^aEducation: 2 = secondary school level; 3 = training qualification; 4 = higher education entrance qualification; 5 = university degree

^bKruskal–Wallis test

^cANOVA

^dChi square

^e t test