Table 1.

Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Scores: Absolute Values

Infusion:	Extended	Overnight	P-Value
Time	Mean (SD) [N]	Mean (SD) [N]
0 (at surgery)	59.2 (18.6) [24]	57.1 (13.1) [23]	N/A
1 Week	41.5 (13.8) [19]	37.1 (15.5) [22]	0.35
1 Month	24.1 (14.7) [13]	20.1 (2.6) [10]	0.36
2 Months	19.4 (17.4) [14]	15.1 (11.3) [15]	0.44
3 Months	12.2 (12.6) [11]	9.1 (7.5) [11]	0.49
6 Months	4.6 (3.9) [13]	8.9 (8.8) [14]	0.11
12 Months	4.8 (9.6) [17]	5.6 (7.8) [16]	0.79
AUC	10.8 (9.4) [17]	11.6 (7.8) [17]	0.80

N/A: Not applicable

AUC: Area Under the Curve