Table 1.
Mean (SD) demographic, cannabis and tobacco use across CT, T and C groups.
| Tobacco users (T) N = 19 |
Cannabis and tobacco users (CT) N = 31 |
Non-smoking Controls (C) N = 35 |
Analysis | |
|---|---|---|---|---|
| Male/female | 5/14 | 18/13 | 15/20 |
X2 = 3.28 p = 0.06 |
| Age (years) | 22.8 (3.6) | 23.3 (3.7) | 22.8 (4.9) |
F(2,82) = 0.227 p = 0.75 |
| Mean IQ | 105.6 (10.88) | 109.2 (11.35) | 111.54 (9.69) |
F(2,82) = 1.78 p = 0.18a |
| Daily cigarettes smoked | 6.6 (5.3) | 4.8 (5.5) | 0 |
t(45) = 1.58 p = 0.12b |
| Years of tobacco use | 6.2 (4.2) | 5.3 (4.3) | 0 |
t(45) = 1.95 p = 0.35b |
| Pack years | 2.7 (3.65) | 2.1 (4.07) | 0 |
t(45) = 1.02 p = 0.31b |
| Total lifetime joints | 25.1 (43.0) | 3703 (4465) | 0 |
t(45) = 12.10 p = 0.001 |
| Years of cannabis use | 0 | 8.2 (4.4) | 0 | n/a |
SD: standard deviation; WASI: Weschler Abbreviated Scale of Intelligence; WRAT: Wide Range Achievement Test.
a
WASI in CT and T groups, WRAT in C group.
b
Test between CT and T groups only.