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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)