Table 1.

Summary of studies used in the review.

Studies	Study Yrs	Followup Duration	Outcomes Analyzed	Total, n	White, n	Black, n	Significantly Worse in Black Patients	Age Adjusted	Sex Adjusted	LOS Adjusted	Comorbidity Adjusted	Adjusted SES	Notes
Maratt, et al¹⁸	2001–2007	2 yrs	WOMAC pain, stiffness, function	2322	2108	101	Pain	Yes	Yes	Yes	Yes	Yes	Retrospective analysis of consecutive prospective cases
Barrack, et al²¹	NA	1–4 yrs	UWSC, satisfaction^*, function	661	573	85	Pain, function^**	Yes				Yes	Retrospective analysis of consecutive prospective cases
Jacobs, et al²³	NA	2–5 yrs	Satisfaction^†	989	830	49	Satisfaction	Yes	Yes			No	Retrospective analysis of consecutive prospective cases
Kamath, et al²⁰	2004	2–5 yrs	ROM, KSS	185	87	90	Pain, function, ROM		Yes			No	Retrospective study
Lavernia, et al¹⁹	1992–2007	2–16 yrs	ROM, WOMAC, HSS, KSRS	1010	176	74	Pain, function		Yes			No	Single surgeon, retrospective analysis of consecutive prospective cases
Lopez-Olivo, et al²²	2004–2005	6 mos	WOMAC pain and function, KSRS total, KSRS function	241	166	61	Function				Yes	Yes	Prospective cohort study
Styron, et al¹⁷		1, 3, 6 mos	WOMAC, SF-12	162	137	22	Pain, function	Yes	Yes				Prospective cohort study

↵* Survey designed by the UWSC; targeted satisfaction with overall knee function, ability to perform daily activities, and pain relief using a 5-point Likert scale.
↵** Questions worse in black and Hispanic patients included: problems getting in and out of the car or chair, difficulty going up and down stairs, experienced pain in the last 30 days, and limp while walking.
↵† Patients were asked if they were satisfied with their surgery and given the options “yes,” “no,” or “I’m not sure” — “yes” were categorized as satisfied. LOS: length of hospital stay; SES: socioeconomic status; NA: not applicable; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; UWSC: University of Wisconsin Survey Center; ROM: range of motion; KSS: Knee Society Score; HSS: Hospital for Special Surgery; KSRS: Knee Society Rating Score; SF-12: Medical Outcomes Study Short Form-12.