Table 2 Descriptive statistics.

Age

42.03 (13.74)

40.46 (11.54)

41.43 (13.44)

0.904

0.964

0.002

Sex

f = 20 m = 13

f = 14 m = 10

f = 10 m = 20

0.065

0.087

Syntactic complexity

0.40 (0.12)

0.42 (0.13)

0.33 (0.09)

0.004^a

0.007

0.121

Syntactic diversity

0.63 (0.12)

0.64 (0.14)

0.54 (0.14)

0.008^a

0.013

0.110

Total no. of words

1131.48 (319.74)

1176.33 (367.70)

1062.80 (440.78)

0.538

0.615

0.015

Total no. of sentences

64.73 (17.57)

64.67 (20.54)

79.53 (35.98)

0.047

0.068

0.070

Years of education

15.38 (2.61)

13.17 (2.57)

11.78 (2.14)

<0.001^b

0.002

0.290

SANS sum score

0.20 (0.58)

5.74 (7.68)

17.07 (11.64)

<0.001^c

0.002

0.451

SANS alogia

0.07 (0.37)

0.83 (1.23)

2.23 (2.51)

<0.001^c

0.002

0.245

SAPS sum score

0.21 (0.83)

1.23 (2.07)

13.24 (13.40)

<0.001^c

0.002

0.362

SAPS pFTD

0.07 (0.37)

1.48 (2.35)

6.43 (8.24)

<0.001^c

0.002

0.253

HAM-D sum score

0.86 (1.75)

4.65 (6.31)

7.96 (6.14)

<0.001^d

0.002

0.284

YMRS sum score

0.21 (0.69)

0.62 (1.20)

5.93 (6.61)

<0.001^c

0.002

0.267

GAF score

90.83 (9.75)

67.50 (12.90)

53.54 (14.49)

<0.001^e

0.002

0.699

Verbal IQ

117.96 (13.57)

112.13 (13.46)

110.55 (14.43)

0.116

0.143

0.055

TIV

1561.67 (157.48)

1540.69 (174.41)

1541.29 (126.81)

0.970

0.970

0.001