Table 2 Risk status calculated by M23

a: Subjects' characteristics

number of subjects

95

221

107

Sex ratio (men/women)

49/46

108/113

57/50

0.607

.738

Age (years)

24.9 (6.5)

25.0 (6.4)

23.8 (3.6)

1.592

.205

Education (years)

15.6 (2.6)

15.5 (2.8)

15.5 (2.2)

0.068

.935

b: Cognitive variables

Spatial span

19.19 (2.85)

18.80 (3.14)

19.53 (2.65)

2.304

.101

Letter-number-span test

16.41 (2.49)

16.25 (2.58)

17.28 (2.25)

6.496

.002

Trail Making Test

58.41 (14.62)

62.81 (19.95)

57.73 (15.39)

3.804

0.23

Semantic verbal fluency

30.76 (8.72)

31.00 (9.31)

32.57 (9.61)

1.277

.280

Lexical verbal fluency

17.25 (4.27)

16.57 (4.48)

16.87 (5.05)

0.753

.472

d2-test

200.9 (35.0)

187.6 (33.4)

198.8 (34.3)

6.832

.001