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

	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

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