Baseline demographic and SIPS variables, comparison between converters and non-converters.
| Variables | Lost | Converters | Non-converters | Comparison | |
| T/Z/χ2 | P value | ||||
| Cases, n | 21 | 16 | 68 | – | – |
| Demographic variables | |||||
| Age (year), mean (SD) | 17.7 (3.8) | 19.4 (5.5) | 18.2 (4.9) | t=0.886 | 0.378 |
| Male, n (%) | 9 (42.9) | 11 (68.8) | 26 (38.2) | χ2=4.894 | 0.027 |
| Female, n (%) | 12 (57.1) | 5 (31.3) | 42 (61.8) | ||
| Education (year), mean (SD) | 9.5 (1.9) | 10.6 (2.4) | 10.5 (3.1) | t=0.022 | 0.982 |
| Height (cm), mean (SD) | 170.0 (9.8) | 168.9 (7.9) | 165.8 (7.2) | t=1.517 | 0.133 |
| Weight (kg) (mean (SD)) | 61.3 (14.6) | 58.5 (14.3) | 56.9 (9.3) | t=0.553 | 0.582 |
| BMI (kg/m2) | 21.1 (3.9) | 20.4 (4.2) | 20.7 (3.0) | t=0.361 | 0.719 |
| If antipsychotic taken (n (%)) | – | 13 (81.3) | 42 (61.8) | χ2=2.176 | 0.140 |
| Dose | – | 6.4 (2.7) | 7.8 (4.6) | t=1.101 | 0.276 |
| SIPS variables | |||||
| Before GAF (mean (SD)) | 78.7 (4.3) | 77.2 (3.8) | 79.7 (2.4) | t=3.242 | 0.002 |
| Now GAF (mean (SD)) | 56.1 (5.7) | 53.1 (5.9) | 57.7 (5.6) | t=2.897 | 0.005 |
| GAF drop (mean (SD)) | 22.8 (5.9) | 24.1 (5.3) | 21.4 (5.3) | t=1.736 | 0.087 |
| SIPS_P (median, mean (SD)) | 10,10.7 (3.1) | 11, 11.3 (3.6) | 10,10.2 (3.6) | Z=1.040 | 0.302 |
| SIPS_N (median, mean (SD)) | 12,12.4 (6.5) | 13,13.7 (4.9) | 11,11.6 (5.6) | Z=1.356 | 0.179 |
| SIPS_D (median, mean (SD)) | 6,6.4 (3.0) | 7, 7.3 (2.4) | 7,6.4 (2.8) | Z=1.267 | 0.209 |
| SIPS_G (median, mean (SD)) | 9,9.2 (3.9) | 10,10.2 (2.0) | 10,9.5 (2.5) | Z=1.011 | 0.315 |
| SIPS_TOTAL (median, mean (SD)) | 40,39.2 (12.5) | 42,42.3 (6.8) | 35,36.2 (9.7) | Z=2.333 | 0.023 |
Dose of antipsychotics was measured using an olanzapine-equivalent dose of antipsychotics.
BMI, body mass index; GAF, Global Assessment of Functioning; GAF drop, GAF baseline score that drops from highest in the past year; SD, standard deviation; SIPS, the 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; t/Z/χ2, t for independent t test, Z for Mann-Whitney U test (non-parametrical test), χ2 for κ test.