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Table 2 Primary endpoint, percentage of patients with NRS pain score>3 within 24 and 48 h postoperatively, first time point of breakthrough pain and ambulated distance postoperatively

From: Continuous Adductor Canal Block used for postoperative pain relief after medial Unicondylar Knee Arthroplasty: a randomized, double-blind, placebo-controlled trial

 

Group RP n = 22

Group Con n = 20

p-value

NRS durimg active knee flexion at 24 h postoperatively

3 (2–4)

5 (4–6)

<0.001

Patients with NRS>3 at rest. No. (%)

   

within 24 h postoperatively

2 (3)

6 (10)

0.150

within 48 h postoperatively

2 (2)

8 (10)

0.049

Patients with NRS>3 with movement. No. (%)

   

within 24 h postoperatively

8 (12)

39 (65)

<0.001

within 48 h postoperatively

17 (19)

54 (68)

<0.001

Time to breakthrough pain (NRS > 3), (hours)

10 (3–24)

18 (4–46)

0.002

Ambulated distance on POD 1, (meters)

37.3 ± 32.2

19.7 ± 22.1

0.046

Ambulated distance on POD 2, (meters)

59.5 ± 28.3

33.4 ± 20.8

0.002

  1. Data are shown as counts, median (interquartile range) or a mean ± SD; NRS = Numeric rating scale (for assessment of pain intensity)