Table 1.
Pearson correlation coefficients for the association between urine cannabinoid concentrations normalized to specific gravity (SG) and creatinine concentration for analytes for which this association differed by smoking group (A), and for which this association differed by route of administration (B).
| A Group | THCCOOH | THCCOOH-glucuronide |
|---|---|---|
| Frequent Smokers | 0.97 | 0.93 |
| Occasional Smokers | 0.94 | 0.95 |
| Overall | 0.97 | 0.95 |
| B Route of Administration | THCVCOOH | THC-glucuronide |
| Oral | 0.91 | 0.94 |
| Smoked | 0.96 | 0.95 |
| Vaporized | 0.92 | 0.94 |
| Oral 5 | 0.95 | 0.96 |
| Placebo | 0.96 | 0.96 |
| Overall | 0.93 | 0.95 |
THCCOOH, 11-nor-9-carboxy-Δ9-tetrahydrocannabinol; THCVCOOH; Δ9-tetrahydrocannabivarin carboxylic acid; THC-glucuronide, -Δ9-tetrahydrocannabinol glucuronide