Response rate by collection period, 10 provinces, adults aged 18 years or older
| Collection period | Dates | Response rate, % | Sample size | Collection method |
|---|---|---|---|---|
| 1 | June 1–Sept. 5, 2021 | 22.6 | 9509 | Computer-assisted telephone interview |
| 2 | Sept. 1–Nov. 14, 2021 | 21.8 | 11 296 | |
| 3 | Nov. 15, 2021–Feb. 7, 2022 | 25.6 | 11 419 | |
| 4 | Feb. 9–May 7, 2022 | 45.0 | 16 066 | Electronic questionnaire, computer-assisted telephone interview for follow-up |
| 5 | Apr. 2–June 30, 2022 | 41.6 | 16 432 | |
| Combined | June 1, 2021–June 30, 2022 | 31.3 | 64 722 | – |