Table 1.
Demographic and clinical data for the participant sample.
| Variables | SZD + PS (n = 34) | SZD + LT (n = 35) | SZD − (n = 17) | HC (n = 28) | Group difference |
|---|---|---|---|---|---|
| Demographics | |||||
| Age: years (M, SD) | 40.24 (8.98) | 37.94 (9.77) | 41.12 (11.97) | 37.86 (9.66) | F(3,110) = 0.70, p = 0.56 |
| Gender (% male) | 85% | 77% | 65% | 86% | χ2(3) = 3.80, p = 0.28 |
| Scanner location (Melbourne/Sydney/Brisbane/Perth/Newcastle) | (7/10/13/2/2) | (8/8/14/1/4) | (1/7/5/1/3) | (8/8/7/4/1) | χ2(12) = 11.37, p = 0.50 |
| Drugs | |||||
| Antipsychotics: months (M, SD) | 49.56 (37.85)a | 45.53 (35.14)b | 55.08 (36.59)c | – | F(2,76) = 0.34, p = 0.72 |
| Substance abuse (%) | 13%a | 15%b | 6%d | – | χ2(2) = 0.67, p = 0.71 |
| Alcohol abuse (%) | 39%a | 33%b | 20%d | – | χ2(2) = 1.61, p = 0.45 |
| Psychopathology | |||||
| Illness duration: years (M, SD) | 15.97 (8.46) | 13.43 (7.84) | 16.47 (10.18) | – | F(2,83) = 1.05, p = 0.35 |
| Hallucinations: current (M, SD) | 1.5 (2.11) | 0.74 (2.02) | 1.82 (2.63) | – | F(2,83) = 1.75, p = 0.18 |
| Hallucinations: remitted (M, SD) | 2.20 (2.29) | 2.86 (3.32) | 3.00 (2.74) | – | F(2,83) = 0.54, p = 0.59 |
| Thought disorder (M, SD) | 0.88 (1.23) | 1.03 (1.64) | 0.24 (0.56) | – | F(2,83) = 2.13, p = 0.13 |
| Depression (M, SD) | 3.85 (3.40) | 4.34 (3.69) | 3.47 (3.68) | – | F(2,83) = 0.37, p = 0.69 |
| Negative symptoms (M, SD) | 1.21 (1.34) | 1.49 (1.48) | 1.71 (1.72) | – | F(2,83) = 0.71, p = 0.50 |
Note. SZD + PS = schizophrenia group with present state delusions; SZD + LT = schizophrenia group with lifetime history of delusions; SZD − = schizophrenia group without a lifetime history or present state delusions; HC = healthy controls; M = mean; SD = standard deviation.
a
n = 31 due to missing data.
b
n = 34 due to missing data.
c
n = 15 due to missing data.
d
n = 13 due to missing data.