Rotational alignment of femoral component with different methods in total knee arthroplasty: a randomized, controlled trial

Table 2 Comparison of the femoral component rotation

		Measured resection (n = 51)	Tensor (n = 50)	Block (n = 52)	p-value
Femoral component rotation^c,d (degree)	Mean	−1.79	−0.43	−2.63	0.0001^a
	Range	−6.9 ~ 3.4	−5.5 ~ 6.1	−10.8 ~ 1.5
	95% confidence interval	−2.43 ~ −1.16	−1.10 ~ 0.24	−3.32 ~ −1.93
Outlier^e	Total	18 (35%)	8 (16%)	21 (40%)	0.020^b
	>3° IR	16	5	21
	>3° ER	2	3	0

Comparison between Measured resection group and Tensor group; p-value 0.0063^a Comparison between Tensor group and Block group; p-value <0.0001^a Comparison between Measured resection group and Block group; p-value 0.0691^a
Femoral component rotation: angle between clinical transepicondylar axis and posterior condylar axis of femoral component
Outlier: Femoral component rotation with more than 3° of external rotation or internal rotation
Abbreviations: IR internal rotation, ER external rotation
^aMixed model for adjustment of auto-correlation
^bChi-square test
^cSubgroup analysis of femoral component rotation angle among groups
^d+ : external rotation, − : internal rotation
^eThe values are given as the number of cases with percentage in parenthesis

ISSN: 1471-2474