Baseline demographic characteristics of study participants
| Group; mean ± SD [median]* | ||||
|---|---|---|---|---|
| Characteristic | Schizophrenia (n = 38) | Control (n = 38) | Statistical test | p value |
| Age, yr | 25.9 ± 6.5 | 25.8 ± 6.4 | t = 0.09 | 0.97 |
| Sex, male:female | 28:10 | 26:12 | χ2 = 0.26 | 0.80 |
| Parental socioeconomic status, high:moderate:low | 7:21:9 | 13:17:8 | χ2 = 3.28 | 0.35 |
| Height, cm | 174.4 ± 8.9 | 178.1 ± 7.5 | t = −1.1 | 0.27 |
| Weight, kg | 76.1 ± 19.9 | 75.9 ± 13.8 | t = 0.07 | 0.94 |
| Handedness, right:ambidextrous:left | 33:2:3 | 31:0:2 | χ2 = 1.92 | 0.38 |
| Years of education | 12.1 ± 2.5 | 15.1 ± 2.8 | t = −4.9 | < 0.001 |
| Smoker, yes:no | 23:15 | 10:27 | χ2 = 8.54 | 0.005 |
| Duration of untreated illness, wk | 75.0 ± 72.5 [62.5] | — | — | — |
| Prior substance abuse, yes:no | 15:23 | — | — | — |
| Prior cannabis abuse, yes:no | 10:28 | — | — | — |
| Urine screening result, tetrahydrocannabinol:benzodiazepine:negative | 5:1:28 | — | — | — |
SD = standard deviation.
↵* Unless indicated otherwise.