Table 2: Percentage of positive substances on UDS*.
| Tested Substance | % |
| Amphetamines | 10.1 |
| Barbiturates | 3.0 |
| Cocaine | 5.9 |
| Methadone | 3.9 |
| PCP | 1.2 |
| Propoxyphene | 0.3 |
| Cannabinoids | 18.1 |
*Calculated as #positives on UDS/total number of UDS obtained for each substance.