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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: Neuroimage. 2011 Feb 22;57(1):69–75. doi: 10.1016/j.neuroimage.2011.02.044

Table 1.

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

HC N = 17 MJ N = 17
Gender: male/female 8/9 15/2
Age (yrs): mean ± SD / range 16.2 ± 2.1 / 13 – 19 17.8 ± 1.1 / 16 – 19
Age of first use (yrs): mean ± SD / range Not applicable 15 ± 1.5 / 12 – 17
Age of regular use (yrs): mean ± SD / range Not applicable 15.8 ± 0.8 / 14 – 17
Total MJ use (number of smokes): mean ± SD / range Not applicable 1367 ± 1292 / 235 – 5250
Cannabinoid count (ng/mL): mean ± SD / range Not applicable 399 ± 381 / 16 – 1000 *
HAM-D: mean ± SD / range 0.2 ± 0.4 / 0 – 1 1.8 ± 3.3 / 0 – 11
HAM-D: mean ± SD / range 1.5 ± 2.4 / 0 – 7 1.9 ± 2.1 / 0 – 7
*

Two subjects registered a negative (−ve) urine cannabinoid count immediately prior to scanning, whereas three subjects showed cannabinoid counts greater than the dynamic range of the test procedure (>1000 ng/mL). SD = standard deviation.