Effect of body mass index on functional outcome in primary total knee arthroplasty - a single institution analysis of 2180 primary total knee replacements

Table 3 Sub-group analysis of post-operative functional outcome scores

	BMI < 25	BMI 25-29	BMI 30-34	BMI 35-39	BMI > 40
	Normal	Overweight	Class 1 obese	Class 2 obese	Class 3 obese
WOMAC scores
6 mo post-operative	29.67	25.8	25.5	30.8	28.6
SF-36 Scores
6 mo post-operative	61.34	63.93	63.65	58.16	58.47

WOMAC: Western Ontario and McMaster University Arthritis Index; BMI: Body mass index.