The accuracy of an extramedullary femoral cutting system in total knee arthroplasty in patients with severe coronal femoral bowing: a radiographic study

Table 4 The outlier rate between the two groups

cFBA	Variable	Outlier (%)		p Value
cFBA	Variable	IM	EM	p Value
≥ 5°and < 10°	Postoperative HKA	25 (33.8)	13 (28.3)	0.527
	Femoral component alignment (α)	19 (25.7)	11 (23.9)	0.828
	Tibial component alignment (β)	3 (4.1)	2 (4.3)	0.938
≥ 10°	Postoperative HKA	20 (55.6)	8 (32.0)	0.069
	Femoral component alignment (α)	17 (47.2)	6 (24.0)	0.066
	Tibial component alignment (β)	2 (5.6)	1 (4.0)	1.000

The values are expressed as patients (n (%))
cFBA coronal femoral bowing angle, IM intramedullary guide group, EM extramedullary guide group, LDFA lateral distal femoral angle, MPTA medial proximal tibial angle, HKA hip-knee-ankle angle
p < 0.05 was considered to indicate statistical significance

ISSN: 1749-799X