Data collection
included blood sampling, magnetic resonance
(MR) imaging (not reported in this study), knee and hip
X-ray and other correlates of knee and hip OA and
osteoporosis. Baseline data (Phase 1) was collected from
February 2002 to September 2004. Follow up data (Phase
2 and 3) was collected on average 2.6 (range 1.4 to 4.8)
and 5 years (range 3.6 to 6.9 years) later. Participants
who did not have an MRI at Phase 1 (n = 105) were
excluded from further participation in the study, as
TASOAC aimed to measure osteoarthritis progression.