Common peroneal nerve palsy after TKA in valgus deformities; a systematic review

Journal of Experimental Orthopaedics

Table 6 Pre and -postoperative alignments

	Studies ^A	Patients (No of knees)	Mean preoperative aFTA° ± SD	Mean Postoperative aFTA° ± SD	mean VCA^B
Osteotomy	5	189 (190)	18.5 ± 5.7	6.2 ± 0.7	12.3
Soft tissue releases	19	1029 (1164)	18.6 ± 6.2	5.2 ± 2.5	13.4
PNR	2	37 (41)	30.1 ± 1.3	5.1 ± 0.3	25.0
No PNR	17	992 (1123)	19.3 ± 6.1	5.2 ± 2.5	14.1
Overall	24	1212 (1353)	19.5 ± 8.4	5.3 ± 2.7	14.2

CPNP Common peroneal nerve palsy, VCA Valgus correction angle, aFTA Anatomical femorotibial angle
No statistical analysis is performed due to a substantial heterogeneity between the studies. All studies are weighted by the number of operated knees. Three study were excluded due to lack of data [29, 30, 32]. Valgus correction angle is calculated by postoperative aFTA minus preoperative aFTA