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Table 3 Association between CHKA and CHFA according to baseline characteristics

From: Association between changes in hip-knee-ankle angle and hindfoot alignment after total knee arthroplasty for varus knee osteoarthritis

Characteristic

n

r

β(95%CI)

P-value

P for interaction

Age(year)

    

0.010*

 <65

46(42.59%)

-0.474

-0.26 (-0.41, -0.12)

0.001

 

 ≥65

62(57.41%)

-0.036

-0.02 (-0.14, 0.11)

0.779

 

Sex

    

0.753

 female

89(82.41%)

-0.247

-0.13 (-0.24, -0.02)

0.020

 

 male

19(17.59%)

-0.316

-0.19 (-0.46, 0.08)

0.187

 

BMI (kg/m2)

    

0.101

 <25

24(22.22%)

-0.05

-0.02 (-0.17, 0.14)

0.824

 

 ≥25

84(77.78%)

-0.32

-0.19 (-0.31, -0.07)

0.002

 

HKAB (0)

    

0.237

 ≤ -10

40(37.04%)

-0.308

-0.15(-0.30, -0.00)

0.054

 

 > -10

68(62.96%)

0.001

0.00 (-0.21, 0.21)

0.992

 

HFAB (0)

    

0.527

 ≤0

26(24.07%)

-0.054

-0.11 (-0.28, 0.06)

0.205

 

 >0

82(75.93%)

-0.298

-0.18(-0.28, -0.07)

0.003

 
  1. Abbreviations: CHKA change in Hip-Knee-Ankle angle, CHFA change in hindfoot alignment, BMI body mass index, HKAB preoperative Hip-Knee-Ankle angle, HFAB preoperative hindfoot alignment
  2. *indicates statistical significance at P <0.05