Table 1.
Demographic and clinical variables by conversion status.
Non-converters (N = 106) | Converters (N = 36) | Test statistic | p-value | |
---|---|---|---|---|
Age at onset | 21.38 (4.85) | 19.63 (2.80) | t (117) = 1.876 | p = 0.042 |
Age at assessment | 29.17 (10.18) | 29.39 (11.41) | t(142) = −0.108 | p = 0.176 |
Sex (% female) | 43.4% | 30.1% | X2 (1) = 1.844 | p = 0.174 |
Race (% Caucasian) | 78.3% | 69.5% | X2 (5) = 6.027 | p = 0.304 |
Education (years)∧ | 15.11 (1.85) | 14.39 (2.98) | t(142) = 1.715 | p = 0.860 |
Comorbid SUD | 60.4% | 36.1% | X2 (1) = 6.375 | p = 0.012 |
Comorbid anxiety disorder | 42.5% | 30.6% | X2 (1) = 1.593 | p = 0.207 |
MADRS | 15.07 (9.65) | 13.85 (11.60) | t(139) = 0.606 | p = 0.213 |
YMRS | 12.03 (12.93) | 9.91 (10.04) | t(140) = 0.882 | p = 0.113 |
PANSS Positive | 14.86 (7.60) | 15.20 (7.44) | t(140) = −0.232 | p = 0.922 |
PANSS Negative | 11.95 (5.26) | 13.75 (5.34) | t(137) = −1.686 | p = 0.924 |
PANSS General | 29.57 (8.50) | 29.09 (9.51) | t(139) = 0.281 | p = 0.526 |
SUD, Substance use disorder; MADRS, Montgomery-Asberg Depression Rating Scale; YMRS, Young Mania Rating Scale; PANSS, Positive and Negative Syndrome Scale.
Education was collected using the SCID coding system. This ordinal system was converted to years of education for ease of interpretation using the following convention: less than high school (10 years), graduated high school (12 years), part college or graduated 2-year college (14 years), graduated 4-year college (16 years), part or complete graduate/professional school (18 years), unknown.
Bold values represent comparisons that reached statistical significance.