Table 1.
Sample characteristics (weighted), by survey wave and country. Values are percentages (numbers) unless stated otherwise
| Characteristics | Canada | England | US | |||||
|---|---|---|---|---|---|---|---|---|
| 2017 (n=4038) | 2018 (n=3853) | 2017 (n=3995) | 2018 (n=3902) | 2017 (n=4095) | 2018 (n=4045) | |||
| Mean (SD) age (years) | 17.6 (1.05) | 17.5 (1.08) | 17.5 (1.02) | 17.6 (1.05) | 17.5 (1.08) | 17.5 (1.07) | ||
| Male | 51.4 (2077) | 51.5 (1984) | 51.3 (2050) | 51.3 (2003) | 51.1 (2094) | 51.1 (2068) | ||
| White (only) race/ethnicity* | 58.4 (2358) | 47.1 (1816) | 79.4 (3172) | 77.0 (3005) | 73.4 (3006) | 73.4 (2970) | ||
| Alcohol use (any) in past 12 months† | 61.6 (2415) | 59.9 (2227) | 76.1 (2974) | 74.8 (2852) | 41.5 (1659) | 38.8 (1529) | ||
| Cannabis use (any) in past 12 months† | 22.5 (892) | 26.8 (1009) | 18.1 (708) | 17.5 (673) | 21.2 (851) | 22.5 (894) | ||
*
Wording of Canadian source question changed slightly, from response option “White” in 2017 to “European” in 2018.
†
Respondents missing data for alcohol use and cannabis use were removed from these calculations.