Unadjusted proportion of being in fair or poor health for persons with radiographic knee OA from each study (OAI, NHANES-III).

*Percentages are weighted using the NHANES-III sampling weights.**Percentage of persons in fair/poor health was not estimated because there were zero persons with a missing race and missing knee pain in NHANES-III.***Percentage of persons in fair/poor health was not estimated because there was only one person with a missing obesity status and missing knee pain status in OAI.