Table 2 Clinical characteristics of the more-KSS-improvement group and the less-KSS-improvement group

Age (year) (mean ± SD)

64.7 ± 7.5

64.3 ± 7.4

0.769

Sex (female:male)

12:32

13:30

0.816

BMI (kg/m²) (mean ± SD)

26.4 ± 3.4

25.8 ± 4.4

0.544

Operated side (left:right)

23:21

26:17

0.519

SONK (yes:no)

10:34

5:38

0.256

Preoperative complications (yes:no)

20:24

20:23

1.000

Preoperative NRS score (median (LQ, UQ))

6.0 (6.0, 8.0)

6.0 (5.0, 7.0)

0.020

Preoperative FTA (°) (mean ± SD)

180.2 ± 3.5

181.4 ± 3.6

0.105

Angle A (ED:AD)

0:44

0:43

–

Angle B (ED:AD)

1:43

4:39

0.202

Angle E (ED:AD)

8:36

17:26

0.034

Angle F (ED:AD)

0:44

3:40

0.116

Prosthesis overhang (yes:no)

2:42

3:40

0.676

Prosthesis loosening (yes:no)

0:44

0:43

–

Operative duration (min) (mean ± SD)

105.7 ± 21.7

114.9 ± 28.6

0.097

TSO (month) (mean ± SD)

30.6 ± 13.2

39.2 ± 16.1

0.008