Table 3:
Types of Quotas Applied to Sample Composition
| Sample component | Quota cells |
|---|---|
| AU smokers/former smokers age 18+ | Geographic regions crossed with sex (realized approximately) |
| CA, US smokers/former smokers age 18–24 | Geographic regions; language in Canada |
| CA smokers/former smokers age 25+ | Geographic regions; language |
| US smokers/former smokers age 25+ | None; most of the sample was from the 4C cohort, expanded in 4C Wave 9 |
| CA, US, EN additional vapers age 18+ | Geographic regions |
| EN smokers/former smokers age 18–24 | Geographic regions crossed with sex |
| EN smokers/former smokers age 25+ | Geographic regions crossed with sex and age group |