Table 2

‚ÄÉNumber of survey participants and response rates across countries

CanadaUSAAustraliaUK
Number recruited2507250027302566
Cooperation rate at recruitment82.3%83.2%78.7%78.8%
Wave 1 retention from recruitment88.3%85.5%87.9%89.8%
Wave 2 retention from Wave 175.8%62.8%77.7%81.4%
Number of cohort participating in Waves 1 and 21679134218761865