Table 1 Characteristics of two groups of patients with schizophrenia and two groups of healthy comparison subjects (means and standard deviations)

Gender m/f

21/7

12/10

12/6

7/11

Mean Age (y)

17.5

(0.4)

17.6

(0.4)

32.1

(0.9)

30.4

(1.4)

Handedness*

27R, 1M

21R, 1L

16R, 1M, 1L

14R, 3M, (1 missing)

Socio-economic status**

3.9

(0.4)

2.6

(0.2)

4.2

(0.4)

3.5

0.3

Short-IQ***

93.3

(4.0)

115.8

(4.2)

91.1

(4.1)

109.9

(4.0)

DSMIV diagnosis:

   Paranoid

22

-

8

-

   Disorganised

5

-

2

-

   Undifferentiated

1

-

1

-

   Residual

-

-

5

-

   Schizoaffective

-

-

2

-

Ratings per question⁺

SANS

2.13

(0.49)

-

1.68

(0.93)

-

SAPS

1.10

(0.8.)

-

0.81

(0.75)

-

Antipsychotic

478.1

(317.4)

-

366.0

(157.6)

-

   Medication (CPZ)^#

-

[N, Atypical/Mixed/Typical]

10/3/2

-

10/2/2

-

[N, without Medication]

13

-

4

-

Mean cigarettes/day/smoker

15

[14, 50%]

5

[20, 91%]

25

[7, 39%]

9

[16, 89%]

[Non-smokers: N, %])^##