Table 2.
Urine cannabinoid data separated into three groups (0–50, 51–150 and >150 ng/mg) based on creatinine-normalized THCCOOH concentration in the first urine specimen at admission. Urine specimens were collected from cannabis users under continuous medical surveillance during cannabis abstinence for up to 30 days.
| Subject | THCCOOH/Creatinine in 1st Specimen (ng/mg) | Time of 1st Negative Specimen (Days) | Time of Last Positive Specimen (Days) | Length of Observation (Days) | # Urine Specimens | Days Between 1st Negative & Last Positive Specimen | # Specimens Between 1st Negative & Last Positive Urine Specimen | CMAX (ng/mg) Between 1st Negative & Last Positive Specimen |
|---|---|---|---|---|---|---|---|---|
| 0 to 50 ng/mg | ||||||||
| A | 47.3 | 1.7 | 4.3 | 4.8 | 47 | 4 | 31 | 32.4 |
| B | 30.1 | 0.3 | 1.5 | 6.9 | 71 | 2 | 14 | 15.7 |
| C | 34.6 | 1.6 | 3.8 | 4.4 | 30 | 3 | 17 | 16.5 |
| E | 9.8 | 0.0 | 2.2 | 5.1 | 26 | 3 | 10 | 9.8 |
| H | 46.8 | 1.4 | 1.2 | 2.8 | 18 | 1 | 0 | ----2 |
| L | 27.8 | 0.3 | 0.0 | 29.9 | 109 | 1 | 0 | ----2 |
| AA | 11.6 | 0.0 | 0.7 | 5.8 | 43 | 1 | 3 | 25.5 |
| BB | 1.8 | 0.0 | ----1 | 2.9 | 19 | ----1 | ----1 | ----1 |
| DD | 0.0 | 0.0 | ----1 | 9.5 | 60 | ----1 | ----1 | ----1 |
| EE | 40.4 | 1.4 | 3.3 | 16.3 | 73 | 3 | 9 | 42.1 |
| GG | 15.7 | 0.3 | 2.4 | 11.8 | 103 | 3 | 16 | 14.3 |
| LL | 24.8 | 0.1 | 21.8 | 21.8 | 87 | 22 | 86 | 30.2 |
| MM | 32.1 | 0.0 | ----1 | 0.6 | 3 | ----1 | ----1 | ----1 |
| OO | 29.5 | 1.2 | 5.6 | 5.7 | 37 | 5 | 30 | 27.0 |
| RR | 34.4 | 0.9 | 3.8 | 3.8 | 31 | 4 | 24 | 24.7 |
| TT | 15.5 | 0.0 | ----1 | 1.7 | 15 | ----1 | ----1 | ----1 |
| ZZ | 43.4 | 2.2 | 8.6 | 29.5 | 181 | 7 | 34 | 22.0 |
| DDD | 5.1 | 0.0 | ----1 | 20.6 | 211 | ----1 | ----1 | ----1 |
| FFF | 0.0 | 0.0 | ----1 | 12.0 | 7 | ----1 | ----1 | ----1 |
| Mean ±SD | 23.7± 15.9 | 0.6 ± 0.8 | 4.6 ± 5.6 | 10.3 ± 9.1 | 61.6 ± 56.8 | 4.5± 5.5 | 21.1 ± 22.6 | 23.6 ± 9.3 |
| 51 to 150 ng/mg | ||||||||
| D | 133.5 | 0.5 | 4.3 | 4.5 | 59 | 5 | 49 | 79.0 |
| F | 101.0 | 1.0 | 3.1 | 2.2 | 18 | 3 | 27 | 132.2 |
| G | 70.2 | ----3 | 1.8 | 1.8 | 11 | ----3 | ----3 | ----3 |
| J | 74.6 | 1.3 | 11.6 | 26.3 | 204 | 11 | 89 | 44.1 |
| K | 120.8 | 7.9 | 8.3 | 9.6 | 55 | 2 | 4 | 8.4 |
| N | 90.6 | 0.9 | 3.3 | 5.8 | 66 | 4 | 18 | 56.7 |
| R | 142.2 | 7.8 | 10.1 | 20.8 | 94 | 4 | 11 | 15.6 |
| S | 96.0 | 2.4 | 3.7 | 20.4 | 117 | 2 | 8 | 11.5 |
| V | 62.6 | 2.9 | 8.9 | 22.4 | 94 | 7 | 22 | 26.4 |
| W | 78.9 | 2.8 | 2.6 | 29.0 | 166 | 1 | 0 | ----2 |
| Y | 83.7 | 6.7 | 16.0 | 29.2 | 109 | 11 | 37 | 112.7 |
| CC | 114.9 | 1.2 | 3.8 | 13.5 | 129 | 3 | 25 | 55.8 |
| FF | 61.9 | 2.2 | 25.3 | 25.7 | 194 | 24 | 164 | 38.8 |
| HH | 101.4 | ----3 | 11.0 | 11.0 | 7 | ----3 | ----3 | ----3 |
| JJ | 96.1 | ----3 | 11.0 | 11.0 | 8 | ----3 | ----3 | ----3 |
| NN | 120.7 | 3.7 | 12.1 | 18.6 | 164 | 10 | 77 | 71.6 |
| 110.0 | 1.2 | 10.7 | 24.6 | 174 | 10 | 78 | 83.0 | |
| WW | 110.2 | 8.3 | 20.9 | 30.4 | 111 | 13 | 42 | 19.9 |
| XX | 92.3 | 0.0 | 17.0 | 27.9 | 264 | 17 | 139 | 55.9 |
| CCC | 71.0 | 1.7 | 5.0 | 29.3 | 164 | 4 | 18 | 44.4 |
| HHH | 109.2 | 5.7 | 13.3 | 22.6 | 126 | 9 | 47 | 51.4 |
| Mean ±SD | 97.2 ± 22.6 | 3.2 ± 2.8 | 9.7 ± 6.4 | 18.4 ± 9.7 | 111.1 ± 70.9 | 7.8 ± 6.0 | 47.5 ± 46.0 | 53.4 ± 34.5 |
| >150 ng/mg | ||||||||
| I | 364.6 | 0.8 | 12.7 | 12.7 | 107 | 13 | 87 | 126.9 |
| M | 155.1 | 1.4 | 6.0 | 7.3 | 69 | 5 | 36 | 52.3 |
| O | 171.7 | 1.6 | 3.6 | 11.0 | 86 | 3 | 17 | 43.3 |
| P | 279.1 | ----3 | 8.2 | 8.2 | 48 | ----3 | ----3 | ----3 |
| Q | 158.4 | 0.8 | 3.6 | 5.7 | 68 | 4 | 34 | 129.4 |
| T | 681.9 | 2.5 | 29.8 | 29.8 | 249 | 28 | 221 | 194.3 |
| U | 190.5 | 15.2 | 29.3 | 29.7 | 198 | 15 | 96 | 19.6 |
| X | 171.8 | 5.8 | 14.7 | 29.6 | 127 | 10 | 36 | 23.2 |
| Z | 248.5 | 4.9 | 6.3 | 29.7 | 125 | 3 | 5 | 11.0 |
| II | 425.2 | ----3 | 11.0 | 11.0 | 7 | ----3 | ----3 | ----3 |
| KK | 315.3 | ----3 | 11.0 | 11.0 | 6 | ----3 | ----3 | ----3 |
| PP | 155.7 | 1.2 | 6.7 | 6.7 | 72 | 6 | 57 | 77.4 |
| SS | 181.3 | 3.0 | 8.8 | 28.5 | 123 | 6 | 24 | 53.2 |
| UU | 333.5 | 5.6 | 18.9 | 20.8 | 125 | 14 | 76 | 158.2 |
| VV | 176.8 | 3.7 | 27.3 | 27.3 | 122 | 25 | 99 | 51.0 |
| YY | 668.1 | 6.1 | 29.2 | 29.7 | 229 | 24 | 174 | 141.3 |
| AAA | 323.3 | 2.1 | 28.5 | 28.5 | 335 | 27 | 287 | 288.7 |
| BBB | 286.9 | 16.1 | 29.8 | 29.8 | 300 | 14 | 119 | 77.0 |
| EEE | 341.4 | ----3 | 12.0 | 12.0 | 8 | ----3 | ----3 | ----3 |
| GGG | 1165.9 | ----3 | 11.0 | 11.0 | 7 | ----3 | ----3 | ----3 |
| Mean ±SD | 339.8 ± 247.3 | 4.7 ± 4.8 | 15.4 ± 9.8 | 19.0 ± 9.9 | 120.6 ± 96.9 | 13.1 ± 9.0 | 91.2 ± 80.7 | 96.4± 76.7 |
1
No urine specimens screened positive at 50 ng/mL
2
No urine specimens between first negative and last positive
3
No urine specimens screened negative at 50 ng/mL