
Measured resection (n = 51)

Tensor (n = 50)

Block (n = 52)

pvalue


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; pvalue 0.0063^{a} Comparison between Tensor group and Block group; pvalue <0.0001^{a} Comparison between Measured resection group and Block group; pvalue 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

^{a}Mixed model for adjustment of autocorrelation

^{b}Chisquare test

^{c}Subgroup analysis of femoral component rotation angle among groups

^{d}+ : external rotation, − : internal rotation

^{e}The values are given as the number of cases with percentage in parenthesis