TABLE 1.
Demographical variables.
| Healthy controls | Individuals with psychosis | Test statistic | |
|---|---|---|---|
| Data set #1: Early course psychosis | |||
| n (%) | 30 (42.30%) | 41 (57.70%) | |
| Age in years (mean ± SD) | 25.03 ± 4.52 | 21.44 ± 4.01 | t (69) = 3.54, p < .0010 |
| Sex (n/%) |
F: 12/40% M: 18/60% |
F: 15/36.60% M: 26/63.40% |
χ2 = .086, p = .77 |
| Education in years (mean ± SD) | 15.77 ± 2.09 | 13.09 ± 1.59 | t (53) = 5.40, p < .0010 |
| Duration of illness in years (mean ± SD) | 1.78 ± 1.17 | ||
| PANSS total (mean ± SD) | 47.38 ± 9.81 | ||
| PANSS negative symptoms (mean ± SD) | 12.61 ± 4.79 | ||
| PANSS positive symptoms (mean ± SD) | 13.27 ± 4.16 | ||
| Data set #2: Chronic psychosis | |||
| n (%) | 34 (53.13%) | 30 (46.87%) | |
| Age in years (mean ± SD) | 32.50 ± 9.10 | 33.07 ± 9.48 | t (62) = −.24, p = .81 |
| Sex (n/%) |
F: 13/38.24% M: 21/61.76% |
F: 11/36.67% M: 19/63.33% |
χ2 = .017, p = .90 |
| Education in years (mean ± SD) | 14.91 ± 2.71 | 13.93 ± 2.95 | t (62) = 1.38, p = .17 |
| Duration of illness in years (mean ± SD) | 7.96 ± 6.45 | ||
| PANSS total (mean ± SD) | 57.13 ± 15.38 | ||
| PANSS negative symptoms (mean ± SD) | 15.60 ± 6.31 | ||
| PANSS positive symptoms (mean ± SD) | 11.80 ± 4.77 | ||
Abbreviations: PANSS, positive and negative symptom scale; SD, standard deviation (Kay et al., 1987).