TABLE 5.
Adjusted demographic and clinical association with methamphetamine, metaqualone and other substance use disorders. (N = 248).
| Variable | Methamphetamine (R2 = 0.38) |
Methaqualone (R2 = 0.17) |
Other (R2 = 0.29) |
|||
|---|---|---|---|---|---|---|
| Adjusted OR | 95% CI | Adjusted OR | 95% CI | Adjusted OR | 95% CI | |
| Age (years) | ||||||
| 18-29(ref) | 1 | (ref) | - | - | - | - |
| 30-44 | 0.7 | (0.3 - 1.6) | - | - | - | - |
| 45-65 | 0.1* | (0.0 - 0.7) | - | - | - | - |
| Sex | ||||||
| Male:Female | 1.9 | (0.7 - 5.3) | 2.6 | (0.8 - 8.4) | 2.7 | (0.4 - 16.0) |
| Ethnicity | ||||||
| Mixed race (coloured) | 1 | (ref) | - | - | 1 | (ref) |
| Black | 0.3** | (0.1 - 0.7) | - | - | 0.5 | (0.1 - 3.3) |
| Caucasian | 0.6 | (0.2 - 2.4) | - | - | 2.0 | (0.4 - 9.5) |
| Asian | 0.5 | (0.1 - 4.5) | - | - | 20.9** | (2.7 - 162.6) |
| Education | ||||||
| ≤ 7 | 1 | (ref) | - | - | - | - |
| 8-11 | 0.7 | (0.2 - 2.0) | - | - | - | - |
| 12 | 0.5 | (0.1 - 1.5) | - | - | - | - |
| > 12 | 0.2 | (0.0 - 1.8) | - | - | - | - |
| Employed | 0.7 | (0.3 - 1.7) | - | - | - | - |
| Marital status | ||||||
| Never married | - | - | 1 | (ref) | - | - |
| Married or cohabiting | - | - | 0.4 | (0.1 - 2.5) | - | - |
| Previously married | - | - | 4.4* | (1.1 - 16.6) | - | - |
| Diagnosis | ||||||
| Schizophrenia spectrum disorder† | 1 | (ref) | - | - | - | - |
| Bipolar type I disorder | 0.5 | (0.2 - 1.6) | - | - | - | - |
| Schizoaffective disorder | 0.4 | (0.1 - 1.6) | - | - | - | - |
| Substance induced psychotic disorder | 26.5*** | (7.1 - 98.6) | - | - | - | - |
| Lifetime MDE | 0.6 | (0.3 - 1.2) | 0.4 | (0.2 - 1.0) | - | - |
| Lifetime anxiety symptoms | - | - | - | - | 2.7 | (0.8 - 9.3) |
| Legal involvement | ||||||
| No arrests | 1 | (ref) | 1 | (ref) | 1 | (ref) |
| Serious violent crime | 2.9 | (0.9 - 9.7) | 4.4* | (1.3 - 15.1) | 6.7* | (1.4 - 32.0) |
| Major crime | 1.0 | (0.2 - 4.1) | 2.4 | (0.7 - 8.8) | 0.2 | (0.0 - 10.1) |
| Other crime | 4.8** | (1.8 - 12.8) | 1.3 | (0.4 - 4.1) | 3.4 | (0.8 - 14.5) |
| Study and setting | ||||||
| CIAM study (outpatients) | - | - | 1 | (ref) | - | - |
| PRP study (inpatients) | - | - | 3.3* | (1.1 - 10.0) | - | - |
| SIP study (inpatients) | - | - | 2.5 | (0.7 - 8.6) | - | - |
***
p < 0.001,
**
p < 0.01,
*
p < 0.05.
†
, Schizophrenia, schizophreniform disorder, brief psychotic disorder, psychotic disorder NOS.
R2 = general coefficient of determination, (McFadden’s R2).
Omitted variables did not reach significance at p < 0.10, and were not entered into models.