Table 1 Demographics of patients with schizophrenia and healthy controls (mean ± SD)

Age (years)

40.62 ± 9.80

39.81 ± 9.56

0.531^a

0.596

Education (years)

9.10 ± 2.85

9.96 ± 3.27

-1.779^a

0.077

BMI (kg/m²)

24.51 ± 3.66

25.37 ± 2.97

-1.637^a

0.104

Smoking

39 (48.8%)

41 (51.2%)

2.525^b

0.112

Age of onset (years)

26.99 ± 8.40

-

-

-

Duration of illness (years)

11.0 (7.0, 18.9) ^c

-

-

-

PANSS total score

58.09 ± 14.90

-

-

-

P subscores

11.03 ± 4.55

-

-

-

N subscores

29.24 ± 6.37

-

-

-

G subscores

17.83 ± 7.18

-

-

-

Equivalent dose of chlorpromazine (mg/d)

589.13 ± 195.19

-

-

-