Table 1 Descriptive statistics of the patient sample at baseline and follow-up.

From: Response to clozapine in treatment resistant schizophrenia is related to alterations in regional cerebral blood flow

 

Baseline

Week 12 follow-up

 

N = 36

N = 24

Age, years

39.47 (13.82)

38.83 (13.04)

Sex, male/female

27/9

18/6

Age of onset, years

26.11 (9.00)

26.13 (8.68)

Duration of illness, years

14.31 (8.77)

13.92 (8.99)

Previous clozapine use, Yes/No

7/29

4/20

Diagnosis, F20-schizophrenia/F25-schizoaffective

30/6

21/3

 

N = 35

 

Previous antipsychotic trials, min; max; median

2; 10; 3

2; 7; 3

Number of hospital admissions, min; max; median

0; 12; 3

0; 12; 3

Symptoms and Functioning

  

PANSS-Positive

18.43 (5.87)

14.33 (5.10)

PANSS-Negative

19.23 (7.51)

15.29 (5.57)

PANSS-General

35.33 (6.94)

27.04 (5.98)

PANSS-Total

72.97 (14.62)

56.29 (14.11)

GAF

45.29 (10.51)

59.42 (8.66)

 

N = 34

 

Antipsychotic dose, CPZE/mg per day

229.21 (187.44)

/

Clozapine

 

N = 22

Clozapine dose, daily mg

/

362.50 (140.31)

Plasma clozapine, ng/ml

/

473.18 (30.99)

Plasma norclozapine, ng/ml

/

240.00 (123.10)

  1. Data shown as mean (standard deviation) unless otherwise specified.
  2. CPZE chlorpromazine equivalent dose, GAF global assessment of functioning, PANSS positive and negative syndrome scale.