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. Author manuscript; available in PMC: 2015 Nov 18.
Published in final edited form as: Drug Alcohol Depend. 2013 Mar 21;129(3):232–239. doi: 10.1016/j.drugalcdep.2013.02.028

Table 1.

Demographics of the HC and MJ subject groups including clinical variable information for the MJ cohort.

HC, N = 16 MJ, N = 13
Gender: male/female 7/9 11/2
†Age (years): mean ± SD/range 16.0 ±2.2/13–19 17.9 ±1.0/16–19
‡HAM-D: mean ± SD/range 0.1 ±0.3/0–1 2.3 ±3.6/0–11
HAM-A: mean ± SD/range 1.6 ±2.5/0–7 2.2 ± 2.3/0–7
Age of first use (years) mean ± SD/range 15.2 ±1.4/13–17
Age of regular use (years) mean ± SD/range 16.0 ±0.9/14–17
Total use (number of smokes) mean ± SD/range 1124 ±1314/235–5250
Cannabinoid count (ng/mL) mean ± SD/range 359 ± 365/16- 1000a
a

Two subjects registered a negative (−ve) urine cannabinoid count immediately prior to scanning, and two subjects showed cannabinoid counts greaterthan the maximum detectable level of the test procedure (>1000 ng/mL).

†

Signficant differences existed between the HC and MJ populations for age (p = 0.01).

‡

Signficant differences existed between the HC and MJ populations for HAM-D (p = 0.02).

Abbreviations: HC, healthy control cohort; MJ, marijuana using cohort; N, number of subjects per cohort; SD, standard deviation; HAM-A, Hamilton rating scale for anxiety; HAM-D, Hamilton rating scale for depression; and ng/mL, nanogram per milliliter.