Table 2. Perioperative data.

	Ropivacaine group	Placebo group
Number of patients	14	16
Operated side (right/left)	8/6	6/10
Duration of surgery (min)	146 (82–194)	138 (100–164)
Order of revision performed:
1. Revision	6/14 (43)	8/16 (50)
2. Revision	5/14 (36)	6/16 (38)
3. Revision	3/14 (21)	1/16 (6)
4. Revision	0/14 (0)	1/16 (6)
Reason for revision TKA * :
Septic loosening	2/14 (14)	4/14 (25)
Aseptic loosening	6/14 (43)	5/14 (31)
Component malposition	3/14 (21.5)	2/14 (12.5)
Instability	3/14 (21.5)	3/14 (19)
Stiffness	0/14 (0)	2/14 (12.5)
Blood loss (ml)	150 (0–450)	200 (0–480)
Isotonic sodium chloride (ml)	1250 (650–2625)	1250 (520–2010)
Hydroxyethyl starch colloids (ml)	0 (0–350)	0 (0–500)

Values are reported as number of subjects, proportions (percentage) or median (10–90%).

*TKA =  total knee arthroplasty.