Table 7: Summary of the Absolute Change in Oxford, WOMAC and HAAS Scores from Preop to 12 Months Post Op Across all BMI Groups

Oxford Scores	THA			TKA			UKA
	BMI < 30	BMI 31-35	BMI > 35	BMI < 30	BMI 31-35	BMI > 35	BMI < 30	BMI 31-35	BMI > 35
Change in score	23.64	24.44	24.6	18.91	17.02	19	20.47	19.59	17.92
SD	8.64	8.95	8.9	8.1	9.68	9.47	8.17	10.36	12.05
Number	629	175	81	335	177	100	154	86	32

WOMAC Scores	THA			TKA
	BMI < 30	BMI 31-35	BMI > 35	BMI < 30	BMI 31-35	BMI > 35
Change in score	46.39	44.04	46.95	39.83	41.23	38.3
SD	17.38	18.55	17.37	17.71	19.37	24.85
Number	332	96	42	162	77	30

HAAS Scores	THA			TKA
	BMI < 30	BMI 31-35	BMI > 35	BMI < 30	BMI 31-35	BMI > 35
Change in score	7.07	7.28	7.74	5.76	5.32	5.78
SD	2.84	2.96	2.69	2.84	3.33	3.15
Number	627	175	81	335	177	100