While the health care quality improvement community has prioritized health disparities in acute care settings, such as hospital inpatient and ambulatory care, less attention was given to disparities in long-term care. This is despite the fact that a growing body of evidence documents pervasive racial, ethnic, and class disparities in long-term care in the United States.5-10 Furthermore, in the past decade, nursing homes have instituted various quality improvement programs and collaboratives, but it is unclear what effect they might have had on disparities. To determine what effect quality improvement efforts have had on disparities, we conducted analyses of the prevalence of selected nursing home clinical measures among long-stay nursing home residents.