Self-reported general and workplace cannabis use among all respondents before (time 1) and after (time 2) the legalisation of cannabis for non-medical purposes
| Time 1 (before legalisation) | Time 2 (after legalisation) | Unadj. P value* | Adj. P value*† | |||||
| % | 95% CI | % | 95% CI | |||||
| From | To | From | To | |||||
| Cannabis use status | <0.0001 | <0.0001 | ||||||
| Never used | 29.2 | 27.1 | 31.3 | 27.6 | 26.0 | 29.3 | ||
| Used >12 months ago | 40.4 | 38.2 | 42.5 | 33.0 | 31.3 | 34.7 | ||
| Used ≤12 months ago | 30.4 | 28.3 | 32.5 | 39.3 | 37.5 | 41.2 | ||
| Past-year frequency of cannabis use | 0.0995 | 0.0267 | ||||||
| Not daily use | 93.0 | 91.9 | 94.2 | 92.0 | 90.9 | 93.0 | ||
| Daily or almost daily use | 7.0 | 5.8 | 8.1 | 8.0 | 7.0 | 9.1 | ||
| Past-year cannabis use before and/or at work | 0.6446 | 0.4580 | ||||||
| Yes | 9.4 | 8.0 | 10.8 | 9.1 | 8.0 | 10.3 | ||
| No | 90.6 | 89.2 | 92.0 | 90.9 | 89.7 | 92.0 | ||
| Past-year cannabis use: | ||||||||
| Within 2 hours before work | 8.1 | 6.8 | 9.4 | 6.9 | 5.9 | 7.9 | 0.1161 | 0.4951 |
| Yes | 91.9 | 90.6 | 93.2 | 93.1 | 92.1 | 94.1 | ||
| No | ||||||||
| At lunch or on other breaks | 0.1842 | 0.5388 | ||||||
| Yes | 6.0 | 4.8 | 7.2 | 5.1 | 4.2 | 6.0 | ||
| No | 94.0 | 92.8 | 95.2 | 94.9 | 94.0 | 95.8 | ||
| While working (excluding breaks) | 0.1927 | 0.4759 | ||||||
| Yes | 5.2 | 4.1 | 6.4 | 4.3 | 3.5 | 5.2 | ||
| No | 94.8 | 93.6 | 95.9 | 95.7 | 94.8 | 96.5 | ||
| After work at the workplace | ||||||||
| Yes | 6.5 | 5.3 | 7.8 | 6.1 | 5.2 | 7.1 | 0.5144 | 0.6177 |
| No | 93.5 | 92.2 | 94.7 | 93.9 | 92.9 | 94.8 | ||
*P values correspond to the results of an F test testing the hypothesis of equal marginal means for the main effect of time (comparing time 1 with time 2 weighted for non-response).
†Adjusted for survey mode, age, sex, province, education, smoking, alcohol, general health status, hazardous work, workplace size, work hours, tenure, workshift schedule, job permanence, and industry.
Adj, adjusted; Unadj, unadjusted.