Documentation for Knee Osteoarthritis Substudy Dataset

Questionnaire) and who had qualifying knee pain in Year 2 but did not have an x-ray or did not have an MRI, had knee x-rays and/or MRIs in Year 3. To be recruited as a control in Year 3, a participant had to have no qualifying knee pain by the knee pain question criteria in both Year 2 and Year 3. ................
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