Flowers PPE, et al. - From a randomized controlled trial on individuals (n=322) with knee osteoarthritis (OA), the researchers assessed racial differences in performance-based physical function as well as possible underlying factors providing to these racial differences. The 2-minute step tests, timed-up-and-go, and 30-second chair stands were assessed. In this cohort of knee OA patients, Blacks had higher unadjusted odds of poorer function in comparison to the Whites. When adjustments for demographic and psychological health covariate, relationships were preserved, but they were either partly attenuated or non-significant when adjusted for physical health and socioeconomic covariates. Hence, a poorer unadjusted performance-based function was observed in Black adults with knee OA as that of the Whites. Also, in decreasing racial disparities in function, physical health and socioeconomic characteristics could be relevant to consider as they diminished these differences.