ROSEMONT, Ill. (Aug. 3, 2016)–Minority populations have lower rates of total knee replacement (TKR) utilization but higher rates of adverse health outcomes associated with the procedure, according to a new study (http://jbjs.
More than 600,000 knee replacements are performed each year in the United States, according to the Agency for Healthcare Research and Quality (AHRQ). The number of TKRs more than doubled from 329,000 in 1997 to 719,000 in 2010. Knee replacements may be recommended for patients with severe knee pain, stiffness and reduced function, often resulting from arthritis or injury.
This AHRQ funded study examined four outcome variables: the rate of total knee arthroplasty, the use of high total knee arthroplasty volume hospitals, in-hospital mortality and in-hospital complications. Patient race was categorized by the State Inpatient Databases (SID) as white, black, Hispanic, Asian, Native American, and mixed race.
The study analyzed data from eight years (2001-2008) and eight racially diverse states (Arizona, Colorado, Iowa, North Carolina, New Jersey, Rhode Island, Wisconsin, and Florida) in the SID, identifying a total of 547,380 admissions that underwent TKR. The three largest ethnic groups were whites (87.24 percent), blacks (5.88 percent) and Hispanics (4.20 percent) and the smallest were Asians (0.46 percent), Native Americans (0.51 percent) and mixed race (1.71 percent).
Patient characteristics included age, sex, admission source (routine and non-routine), insurance type (Medicare, Medicaid, private, and other), surgical reason, length of hospital stay, and year of surgery among others. The study excluded patients under 45 years of age and patients who underwent TKR for a congenital dislocation, infection or a neoplasm – new and abnormal growth of tissue that replaces healthy tissue.
Among the results:
“Even after adjusting for certain patient demographics, socioeconomic status, and health care system …