Table 1.
Demographic Characteristics
| C (n = 19) | CT (n = 21) | T (n = 21) | HC (n = 21) | p-values | |
|---|---|---|---|---|---|
| Sex, n(%), male | 10 (53) | 16 (76) | 12 (57) | 14 (67) | 0.41 |
| Age | 28 (7) | 31 (9) | 34 (9) | 31 (9) | 0.15a |
| Years of education | 13 (2) | 13 (1) | 14 (1) | 13 (1) | 0.17 |
| Nicotine dependence (FTND) | - | 4.6 (1.3) | 4.2 (1.6) | - | 0.51b |
| Cigarettes per day | - | 7.6 (6.7) | 14.1 (4.4) | - | 0.001b |
| Pack years | - | 4.5 (4.9) | 10.2 (8.2) | - | 0.009b |
| Age of onset of weekly cannabis use | 20 (6) | 17 (12) | - | - | 0.36c |
| Cannabis use, years | 8 (6) | 14 (9) | - | - | 0.02c |
| Cannabis use, past 30 days | 27 (4) | 25 (6) | - | - | 0.11c |
| Cannabis use, grams/week | 14 (11) | 20 (11) | - | - | 0.07c |
a p-value for Kruskal-Wallis nonparametric test of difference between groups
b p-values for comparison between CT and T groups
c p-values for comparison between C and CT groups
Values are shown as means (standard deviation). C, cannabis-dependent individual who does not smoke tobacco; CT, cannabis-dependent individual who smokes tobacco; FTND, Fagerstrom Test of Nicotine Dependence; HC, healthy control; T, cannabis-naïve, nicotine-dependent individual who smokes tobacco.