TABLE 1.
Characteristics of the community and calibration samples.
| Characteristic | Community sample |
Calibration sample |
|||||
| % | Mean (SD) | Median | Range | Mean (SD) | Median | Range | |
| Age (years) | 43.1 (9.5) | 44.0 | 23-68 | 21.8 (6.5) | 20.0 | 17-52 | |
| Education (years)a | 10.2 (2.3) | 10.0 | 2-16 | 13.0 (1.3) | 13.0 | 10-18 | |
| Premorbid IQ (WTAR estimate)b | 96.4 (9.6) | 97.0 | 70-122 | 103.6 (8.3) | 105.0 | 77-121 | |
| Role functioning (RFS)c | 11.9 (3.3) | 12.0 | 5-24 | ||||
| Global functioning (GAF)d | 38.2 (10.4) | 37.0 | 15-70 | ||||
| Ethnic origin | |||||||
| European | 59.6 | ||||||
| Indigenous | 27.7 | ||||||
| Other | 12.7 | ||||||
| Psychiatric diagnosis | |||||||
| Schizophrenia spectrum | 12.9 | ||||||
| PNOS | 12.6 | ||||||
| Major depression | 14.7 | ||||||
| Bipolar disorder I or NOS | 5.4 | ||||||
| Bipolar disorder II | 2.4 | ||||||
| Substance induced disorders | 29.6 | ||||||
| Substance dependence (baseline) | |||||||
| Alcohol | 18.0 | ||||||
| Cannabis | 32.7 | ||||||
| Cocaine | 69.0 | ||||||
| Methamphetamine | 25.5 | ||||||
| Heroin | 36.9 | ||||||
| HIV seropositivity | 15.2 | ||||||
| HCV antibody reactivity | 62.2 | ||||||
Higher GAF and RFS scores indicate better functioning. WTAR = Weschler Test of Adult Reading; RFS = Role Functioning Scale; GAF = Global Assessment of Functioning; PNOS = Psychosis Not Otherwise Specified; NOS = Not Otherwise Specified; HIV = Human Immunodeficiency Virus; HCV = Hepatitis C Virus. aNote that 88% of the calibration sample were current undergraduate students and 58 percent spoke English as a second language; estimated IQ therefore likely under-represents true intellectual function. bn = 287. cn = 292. dn = 293.