Table 4.
Factorial analysis of items on the ODAS
| ODAS | Factor 1 | Factor 2 | Factor 3 | Factor 4 |
|---|---|---|---|---|
| 1. Continued heroin use | 0.153 | 0.923* | 0.164 | 0.105 |
| 2. “Narcotic blockade” (crossed tolerance) | 0.126 | 0.915* | 0.198 | 0.129 |
| 3a. Frequency of objective OWS | 0.130 | 0.215 | 0.882* | 0.145 |
| 3b. Intensity of objective OWS | 0.180 | 0.147 | 0.889* | 0.150 |
| 4a. Frequency of subjective OWS | 0.249 | 0.324 | 0.132 | 0.789* |
| 4b. Intensity of subjective OWS | 0.165 | −0.003 | 0.176 | 0.911* |
| 5a. Frequency of heroin craving | 0.801* | 0.113 | 0.125 | 0.068 |
| 5b. Intensity of heroin craving | 0.792* | −0.008 | 0.003 | 0.236 |
| 6a. Frequency of overmedication | 0.683* | 0.215 | 0.187 | 0.049 |
| 6b. Intensity of overmedication | 0.757 | 0.088 | 0.118 | 0.169 |
| Eigen value | 3.87 | 1.84 | 1.52 | 1.01 |
| Percentage of variance | 39.73 | 16.40 | 11.27 | 10.11 |
Note: Factor 1: Heroin craving and overmedication; Factor 2: Consumption; Factor 3: Objective OWS; Factor 4: Subjective OWS; OWS: Opiate withdrawal symptoms.
*
The greatest amount of variance coefficient in each factor.