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

Table 2 Pre- and post-operative functional outcome scores

	Group 1 (BMI < 25)	Group 2 (BMI > 25)
WOMAC scores
Pre-operative	52.7 (1-84)	53.7 (3-96)	P = 0.5
6 mo post-operative	29.7 (1-83)	27 (1-95)	P = 0.075
SF-36 Scores
Pre-operative	48.8 (10.4-90.6)	48.25 (3.3-94.6)	P = 0.83
6 mo post-operative	61.34 (1-83)	62.15 (7.3-99.4)	P = 0.7

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