| Correlate | Ever use of e-cigarettes | Past 30-day use of e-cigarettes | ||
| Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
| Sex | ||||
| Male | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Female | 0.68 (0.60-0.77) | 0.76 (0.65-0.90) | 0.60 (0.49-0.75) | 0.71 (0.59-0.86) |
| Grade | ||||
| 6-9 | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| 10-12 | 3.30 (2.78-3.91) | 1.06 (0.92-1.23) | 2.99 (2.21-4.05) | 0.78 (0.63-0.98) |
| Ethnicity | ||||
| White | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Black | 0.94 (0.72-1.22) | 1.06 (0.78-1.44) | 1.05 (0.71-1.55) | 1.16 (0.79-1.71) |
| Asian* | 0.45 (0.35-0.59) | 0.69 (0.58-0.83) | 0.47 (0.35-0.64) | 0.83 (0.61-1.12) |
| Aboriginal | 1.75 (1.42-2.15) | 0.91 (0.71-1.18) | 1.99 (1.54-2.58) | 0.81 (0.60-1.10) |
| Latin American | 1.16 (0.80-1.69) | 0.80 (0.46-1.40) | 1.30 (0.93-1.81) | 0.97 (0.58-1.63) |
| Other | 0.76 (0.60-0.96) | 1.07 (0.81-1.41) | 0.71 (0.46-1.09) | 0.98 (0.57-1.69) |
| Urban location of school | ||||
| Yes | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| No | 1.46 (1.07-1.98) | 0.86 (0.69-1.08) | 1.34 (0.96-1.88) | 0.84 (0.55-1.29) |
| Socioeconomic level of school neighbourhood | ||||
| Middle | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Low | 1.42 (1.02-1.98) | 1.13 (0.91-1.39) | 1.49 (1.06-2.11) | 1.13 (0.86-1.49) |
| High | 1.15 (0.74-1.78) | 1.17 (1.01-1.36) | 1.40 (0.95-2.07) | 1.55 (1.26-1.92) |
| Province† | ||||
| Ontario | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Alberta | 1.07 (0.80-1.42) | 1.32 (1.02-1.71) | 1.03 (0.68-1.56) | 1.25 (0.83-1.89) |
| British Columbia | 1.37 (1.01-1.88) | 1.59 (1.26-2.01) | 1.62 (1.20-2.20) | 1.86 (1.30-2.66) |
| Manitoba | 1.39 (1.03-1.87) | 1.24 (0.89-1.72) | 2.22 (1.49-3.30) | 2.20 (1.42-3.42) |
| Newfoundland and Labrador | 2.13 (1.67-2.70) | 1.87 (1.41-2.50) | 3.36 (2.33-4.84) | 2.85 (1.70-4.79) |
| Nova Scotia | 1.49 (1.18-1.89) | 1.26 (1.01-1.56) | 1.93 (1.45-2.56) | 1.56 (1.14-2.15) |
| Prince Edward Island | 1.61 (1.25-2.06) | 1.18 (0.90-1.54) | 2.23 (1.67-2.98) | 1.57 (1.09-2.25) |
| Quebec | 1.89 (1.40-2.57) | 2.33 (1.88-2.89) | 1.58 (0.99-2.52) | 1.50 (0.98-2.30) |
| Saskatchewan | 1.51 (1.03-2.22) | 1.29 (0.99-1.68) | 1.97 (1.34-2.89) | 1.69 (1.09-2.62) |
| Smoking status | ||||
| Never tried smoking | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Experimental smoker | 14.92 (13.23-16.82) | 3.88 (3.03-4.97) | 14.16 (11.35-17.66) | 3.61 (2.40-5.42) |
| Former smoker | 43.28 (22.87-81.91) | 10.5 (4.20-26.0) | 14.13 (7.71-25.92) | 2.75 (1.31-5.80) |
| Current smoker | 34.21 (25.13-46.58) | 5.88 (3.91-8.85) | 48.07 (34.49-67.00) | 10.0 (6.66-15.02) |
| Tried other tobacco products | ||||
| No | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Yes‡ | 20.76 (17.81-24.21) | 5.42 (4.18-7.02) | 20.39 (17.01-24.45) | 4.33 (3.20-5.87) |
| Perceived ease of access to e-cigarettes | ||||
| Very or fairly difficult | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Very or fairly easy | 9.03 (7.77-10.50) | 4.86 (4.21-5.61) | 10.22 (7.95-13.13) | 3.86 (2.96-5.03) |
| Don't know | 0.62 (0.47-0.80) | 0.83 (0.63-1.11) | 0.89 (0.59-1.35) | 1.13 (0.70-1.84) |
| Correlate | Ever use of e-cigarettes | Past 30-day use of e-cigarettes | ||
| Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
| Perceived risk of harm from using e-cigarettes on regular basis | ||||
| No risk | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) | 1.00 (ref) |
| Slight risk | 0.66 (0.58-0.75) | 0.71 (0.58-0.87) | 0.54 (0.44-0.66) | 0.68 (0.52-0.88) |
| Moderate risk | 0.26 (0.22-0.31) | 0.34 (0.27-0.42) | 0.23 (0.18-0.28) | 0.40 (0.31-0.51) |
| Great risk | 0.10 (0.08-0.11) | 0.16 (0.12-0.21) | 0.10 (0.07-0.13) | 0.25 (0.17-0.34) |
| Don't know | 0.09 (0.07-0.12) | 0.20 (0.16-0.26) | 0.10 (0.07-0.14) | 0.31 (0.21-0.46) |
Note: CI = confidence interval, OR = odds ratio, ref = reference category.
*"Asian" combines students who identified as West Asian/Arab, South Asian or East/Southeast Asian.
†The 2014/15 Canadian Student Tobacco, Alcohol and Drugs Survey does not include a generalizable sample of students from the province of New Brunswick. As a result, data for New Brunswick students cannot be used to produce provincial estimates.
‡Students who reported using little cigars or cigarillos, cigars, roll-your-own cigarettes, bidis, smokeless tobacco, water pipe or blunt wraps.