Table 3.
Serum, urine, and semen concentrations of THC and THC metabolites in study participants
| THC metabolite | Median, mean, SD (range) | Units | Reporting limit |
|---|---|---|---|
| Serum, delta-9 THC | 1.6, 2.9, 5.3 (0–19.0) | ng/mL | 0.50 |
| Serum, delta-9 carboxy THC | 20.5, 29.8, 38.6 (0–140.0) | ng/mL | 5.0 |
| Serum, 11-hydroxy delta-9 THC | 0.0, 1.5, 3.1 (0–11.0) | ng/mL | 1.0 |
| Urine, delta-9 carboxy THC* | 155.0, 252.8, 221.7 (11–> 500) | ng/mL | 10 |
| Urine, 11-hydroxy delta-9 THC corrected by urine creatinine* | 104.3, 108.4, 84.3 (6.7–250.3) | ng/mg of creatinine | ---- |
| Semen, delta-9 THC** | 0.87–0.97 | ng/mL | 0.50 |
*Urine delta-9 carboxy THC had an upper limit of detection of 500 ng/mL. For any results reported as > 500 ng/mL, they were treated as = 500 ng/mL
**Reported as range only as there were only 2 patients with detectable delta-9 THC