Table 7. Association of different drug types with LTL.
| Type of drug | Number of drug abusers | T/S ratio (mean ± SD) | P value | |
|---|---|---|---|---|
| Depressant drugs | 0.038 | |||
| Heroin | 281 | 0.763 ± 0.167 | 0.018 | |
| Opium | 8 | — | — | |
| Dolantin | 21 | 0.739 ± 0.214 | 0.198 | |
| Morphine | 9 | — | — | |
| Methadone | 83 | 0.771 ± 0.154 | 0.935 | |
| Dihydroetorphine | 3 | — | — | |
| Buprenorphine | 3 | — | — | |
| Diazepam | 58 | 0.736 ± 0.195 | 0.009 | |
| Secobarbital | 3 | — | — | |
| Tramadol | 102 | 0.757 ± 0.196 | 0.051 | |
| Marijuana | 37 | 0.816 ± 0.225 | 0.339 | |
| Bucinperazine | 3 | — | — | |
| Stimulant drugs | 0.525 | |||
| Somedon | 35 | 0.806 ± 0.236 | 0.601 | |
| MDMA | 63 | 0.808 ± 0.241 | 0.582 | |
| Methamphetamine | 168 | 0.789 ± 0.198 | 0.798 | |
| Cocaine | 7 | — | — | |
| Ephedrine | 4 | — | — | |
| Ketamine | 105 | 0.819 ± 0.220 | 0.094 | |
| Hallucinogenic drugs | 0.086 | |||
| Triazolam | 62 | 0.753 ± 0.198 | 0.086 | |
| CNB | 1 | — | — | |
P values were calculated using a multivariate regression model adjusted for age and gender. MDMA, methylenedioxymethamphetamine. CNB, Caffeine and sodium benzoate.