Demographic and clinical variables, comparison among FES, CHR and HC groups
| FES | CHR | HC | Comparison | |
| F/χ2 (P value) | ||||
| Cases, n | 57 | 105 | 52 | – |
| Demographic variables | ||||
| Age (year), mean (SD) | 24.4 (8.5) | 18.3 (4.8) | 27.3 (9.2) | F=31.5 (<0.001) |
| Male, n (%) | 30 (52.6) | 46 (43.8) | 26 (50.0) | χ2=1.303 (0.521) |
| Education (year), mean (SD) | 11.8 (3.2) | 10.3 (2.8) | 16.2 (5.7) | F=41.2 (<0.001) |
| Height (cm), mean (SD) | 168.1 (7.2) | 167.1 (8.0) | 167.0 (7.4) | F=0.4 (0.664) |
| Weight (kg), mean (SD) | 59.5 (9.9) | 58.1 (11.4) | 61.3 (9.7) | F=1.6 (0.206) |
| BMI (kg/m2) | 21.0 (3.3) | 20.7 (3.4) | 21.9 (2.6) | F=2.4 (0.093) |
| PANSS variables | ||||
| PANSS_P | 22.8 (5.5) | – | – | – |
| PANSS_N | 16.9 (8.1) | – | – | – |
| PANSS_G | 44.2 (6.9) | – | – | – |
| PANSS_TOTAL | 83.8 (15.1) | – | – | – |
| SIPS variables | ||||
| SIPS_P | – | 10.5 (3.4) | – | – |
| SIPS_N | – | 12.1 (5.7) | – | – |
| SIPS_D | – | 6.5 (2.8) | – | – |
| SIPS_G | – | 9.6 (2.8) | – | – |
| SIPS_TOTAL | – | 38.0 (10.1) | – | – |
BMI, body mass index; CHR, clinical high risk; FES, first-episode schizophrenia; HC, healthy control; PANSS, Positive and Negative Syndrome Scale; PANSS_G, scores of general psychopathology scale in PANSS; PANSS_N, scores of negative symptoms scale in PANSS; PANSS_P, scores of positive symptoms scale in PANSS; PANSS_TOTAL, total scores of PANSS; SD, standard deviation; SIPS, Structured Interview for Prodromal Syndromes; SIPS-D, scores of disorganisation symptoms scale in SIPS; SIPS_G, scores of general symptoms scale in SIPS; SIPS_N, scores of negative symptoms scale in SIPS; SIPS_P, scores of positive symptoms scale in SIPS; SIPS_TOTAL, total scores of SIPS.