Table 3.
Distribution of other drugs use according to N2O use; comparisons between N2O users and non-users were made by bivariate test (chi-square) and multivariate test (multivariate logistic regression). (*) not retained for the multiple logistic regression (p > 0.20). (§) not in the final model after stepwise multiple logistic regression.
| Variable | Never Used N2O | N2O Users | Bivariate Test | Multivariate Test | ||
|---|---|---|---|---|---|---|
| n | % | n | % | p-Value | p-Value (OR) | |
| Lifetime users: | ||||||
| MDMA | 3 | 2.2 | 73 | 16.1 | 0.0001 | 0.66 |
| Ketamine | 0 | 0 | 19 | 4.2 | 0.006 | (§) |
| Mushrooms | 5 | 3.6 | 37 | 8.2 | 0.07 | 0.09 (0.28) |
| LSD | 0 | 0 | 12 | 2.6 | 0.04 | (§) |
| Poppers | 16 | 11.5 | 308 | 67.8 | 0.0001 | 0.0001 (8.98) |
| Cocaine | 3 | 2.2 | 54 | 11.9 | 0.001 | 0.80 |
| Last-month users (even occasionally): |
||||||
| MDMA | 1 | 0.7 | 29 | 6.4 | 0.001 | (§) |
| Ketamine | 0 | 0 | 7 | 1.5 | 0.14 | (§) |
| Mushrooms | 2 | 1.4 | 8 | 1.8 | 0.57 | (*) |
| LSD | 0 | 0 | 3 | 0.7 | 0.45 | (*) |
| Poppers | 4 | 2.9 | 132 | 29.1 | 0.0001 | (§) |
| Cocaine | 0 | 0 | 19 | 4.2 | 0.006 | (§) |