Table 3 Postoperative clinical results between elderly patients (aged ≥75 years) and nonelderly patients (aged < 75 years)

Maximum extension (°)

1.6 (2.7)

1.1 (2.0)

0.171

Maximum flexion (°)

128.7 (7.9)

131.0 (8.1)

0.142

 Pain

85.4 (11.9)

88.8 (11.9)

0.143

 Symptom

85.4 (11.8)

86.0 (11.2)

0.800

 ADL

82.0 (12.9)

88.3 (11.8)

0.010*

 Sports

52.3 (25.3)

63.7 (25.4)

0.022*

 QOL

65.4 (21.3)

71.6 (18.3)

0.104

Knee society functional score

78.8 (16.0)

88.1 (14.0)

0.002*

Femorotibial angle (°) in X-ray

178.1 (3.1)

177.2 (3.0)

0.137