At baseline, CHECK included 1002 participants with in general similar characteristicsas described for the OAI. However, significantly fewer individuals in CHECK had radiographicknee osteoarthritis at baseline when compared with the OAI (p<0.001). In contrast, at baseline, theCHECK cohort reported higher scores on pain, stiffness and functional disability (Western Ontarioand McMaster osteoarthritis index) when compared with the OAI (all p<0.001). These differenceswere supported by physical health status in contrast to mental health (Short Form 36/12) was atbaseline significantly worse for the CHECK participants (p<0.001).
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