Should a Patients BMI Status be Used to Restrict Access to Total Hip and Knee Arthroplasty? Functional Outcomes of Arthroplasty Relative to BMI

Table 5: Difference in Mean Functional Scores of ≤ 30 BMI Group vs Higher BMI Groups at Pre Op

THA Group	Oxford		WOMAC		HAAS
THA Group	BMI 31-35	BMI > 35	BMI 31-35	BMI > 35	BMI 31-35	BMI > 35
Difference in mean score of ≤30 BMI group compared to higher BMI groups	1.86	2.7	3.36	4.03	0.53	0.56
95% Confidence interval	1.04 - 2.68	1.58 - 3.82	1.07 - 5.65	0.41- 7.65	0.28 - 0.78	0.25 - 0.91
P value	<0.0001	<0.0001	0.0041	0.0157	<0.0001	0.0008
TKA Group	Oxford		WOMAC		HAAS
TKA Group	BMI 31-35	BMI > 35	BMI 31-35	BMI > 35	BMI 31-35	BMI > 35
Difference in mean score of ≤30 BMI group compared to higher BMI groups	0.14	2.1	3.02	3.5	0	0.77
95% Confidence interval	-0.79 - 1.07	0.99 - 3.21	0.30 - 5.74	-0.32 - 7.32	-0.30 - 0.30	0.41 - 1.13
P value	0.7553	0.0002	0.0304	0.0729	0.9649	<0.0001
UKA Group	Oxford
UKA Group	BMI 31-35	BMI > 35
Difference in mean score of ≤30 BMI group compared to higher BMI groups	1.27	3.19
95% Confidence interval	-036 - 2.90	0.97 - 5.41
P value	0.1091	0.0048