Motor-sparing peripatellar plexus block provides noninferior block duration and complete block area of the peripatellar region compared with femoral nerve block: a randomized, controlled, noninferiority study

Table 2 Nerve block characteristics in the two groups

Outcomes	PP group (n = 25)	FN group (n = 25)	Estimate (95% CI)	P value
The block duration (h)	14.72 ± 2.50	15.96 ± 3.01	MD: -1.24 (-2.81, 0.33)	0.119^a
The onset time of block (min)	2.00 ± 2.00	1.62 ± 1.02	MD: 0.38 (-0.52, 1.28)	0.402^a
Complete anesthesia of the incision line for TKA	25 (100%)	14 (56%)	RR: 1.79 (1.26, 2.53)	0.001^b
Bromage scores 30 min after block			NA	< 0.001^c
0	25 (100%)	0 (0%)
1	0 (0%)	12 (48%)
2	0 (0%)	13 (52%)
3	0 (0%)	0 (0%)

Data are expressed as mean ± SD and MD (95% CI) for continuous outcomes; and as number (%) and RR (95% CI) for categorical outcomes. MD, mean difference; RR: relative risk; CI, confidence interval; NA, not applicable; PP, peripatellar plexus; FN, femoral nerve; a, Student’s t test; b, Pearson’s χ² test.; c, Mann-Whitney test

ISSN: 1471-2253