Table 1
Demographics of study participants and non-participants (n=10 895)
Participants, n=9274 (85.1%)
Non-participants, n=1621 (14.9%)
Age (years, mean (SD))
55.1 (18.5)
55.7 (20.0)
Female gender (n(%))
5635 (61.0%)
1050 (64.8%)