Wave 1 main survey rates
| Canada | USA | UK | Australia | |
|---|---|---|---|---|
| No. from recruitment survey | 2507 | 2500 | 2730 | 2566 |
| Refused | 4.5% | 4.7% | 6.5% | 3.7% |
| Non-contact | 7.3% | 9.8% | 5.6% | 6.5% |
| Follow-up rate | 88.2% | 85.5% | 87.9% | 89.8% |
| No. of completed interviews | 2214 | 2138 | 2401 | 2305 |
| Survey length (min) | 43.4 | 44.6 | 38.6 | 38.7 |