Table 1.
Demographic and clinical measures.
| HC (n = 31) |
MJ (n = 43) |
HC vs. MJ | |||
|---|---|---|---|---|---|
| N | % | N | % | χ2 | |
| Sex (male) | 24 | 77.42 | 40 | 93.00 | .05 |
| Mean | SD | Mean | SD | p-Value | |
|---|---|---|---|---|---|
| Age | 17.20 | 1.38 | 18.00 | 1.22 | .01 |
| Age of first MJ use | – | – | 14.66 | 1.41 | – |
| Frequency of MJ use (#/week) | – | – | 14.78 | 15.02 | – |
| Total lifetime MJ use (# events) | – | – | 1993.15 | 2157.92 | – |
| GAF | 90.56 | 4.14 | 79.49 | 10.01 | <.001 |
| BIS non planning | 22.18 | 3.79 | 25.19 | 4.13 | <.01 |
| BIS motor | 19.04 | 3.91 | 19.81 | 4.54 | ns |
| BIS attention | 16.11 | 3.75 | 17.74 | 3.07 | .05 |
| BIS total | 57.32 | 9.33 | 62.74 | 8.58 | .01 |
HC = healthy control; MJ = marijuana; SD = standard deviation; GAF = Global Assessment of Functioning; BIS = Barratt Impulsiveness Scale.