Table 2.

Anesthetic and Analgesic Outcomes of Both Groups

	End-hole n = 36	Six-hole n = 36	P value
PRIMARY OUTCOME
Ropivacaine volume at 24 h (mL)	178 (150–210)	173 (150–195)	0.478
SECONDARY OUTCOMES
Ropivacaine volume at 48 h (mL)	387 (323–466)	365 (295–418)	0.452
Ropivacaine boluses at 24 h	4 (2–8)	4 (2–7)	0.832
Ropivacaine boluses at 48 h	5 (3–9)	7 (1–10)	0.768
Time of catheter placement (min)	20 (12–20)	15 (12–20)	0.751
Quadriceps strength at 24 h (%)	10 (0–28)	7 (0–20)	0.733
Quadriceps strength at 48 h (%)	31 (3–45)	16 (10–30)	0.394
Morphine consumption at 24 h (mg)	0 (0–20)	0 (0–20)	0.749
Morphine consumption at 48 h (mg)	20 (0–40)	20 (0–40)	0.785
No rescue morphine at 24 h	20	20	1
No rescue morphine at 48 h	10	13	0.614
Catheter visualization	9 (8–10)	7 (3–8)	0.001
Median of average NRS at 0 h (time zero)	0 (0–5)	0 (0–5)	0.797
Median of average NRS at 24 h	2 (0–4)	2 (0–3)	0.486
Median of maximum NRS at 24 h	4 (2–6)	4 (2–5)	0.219
Median of average NRS at 48 h	3 (1–4)	2 (0–3)	0.307
Median of maximum NRS at 48 h	4 (2–6)	4 (2–5)	0.232
Satisfaction score	9 (8–10)	9 (8–10)	0.808

Data are presented as n (%) or median with IQR. NRS: pain assessed on numeric rating scale, Satisfaction score: satisfaction on numeric rating scale, where 0 = not satisfied at all and 10 = very satisfied