Skip to main content

Table 4 Clinical features of the satisfaction group and the dissatisfaction group

From: Factors affecting the clinical outcomes including patient satisfaction after Oxford unicompartmental knee arthroplasty: a retrospective study

 

Satisfaction

Group

Dissatisfaction Group

P Value

Age (year) (mean ± SD)

64.4 ± 7.5

65.1 ± 7.3

0.753

Sex ratio (female:male)

20:53

5:9

0.532

BMI (kg/m2) (mean ± SD)

26.0 ± 3.9

26.6 ± 3.6

0.580

Operated side (left:right)

41:32

8:6

1.000

Operative duration (min) (mean ± SD)

108.5 ± 24.6

119.2 ± 30.0

0.154

SONK (yes:no)

12:61

3:11

0.702

Preoperative complications (yes:no)

33:40

7:7

0.777

TSO (months) (mean ± SD)

34.6 ± 15.6

36.1 ± 14.1

0.746

Preoperative NRS score (median (LQ, UQ))

6.0 (5.0, 7.0)

6.0 (6.0, 7.0)

0.605

Postoperative NRS score (median (LQ, UQ))

1.0 (0, 2.0)

3.0 (2.75, 5.0)

< 0.001

NRS score improvement (median (LQ, UQ))

5.0 (4.0, 6.0)

3.0 (2.0, 4.0)

0.001

Preoperative KSS (mean ± SD)

113.9 ± 28.5

108.3 ± 19.4

0.374

Preoperative knee score (mean ± SD)

58.5 ± 16.0

60.8 ± 10.8

0.608

Preoperative function score (mean ± SD)

55.4 ± 18.5

47.5 ± 10.5

0.126

Postoperative KSS (mean ± SD)

173.7 ± 18.8

133.2 ± 18.4

< 0.001

Postoperative knee score (median (LQ, UQ))

95.0 (85.0, 99.0)

80.0 (62.75, 89.0)

< 0.001

Postoperative function score (median (LQ, UQ))

80.0 (70.0, 90.0)

60.0 (50.0, 60.0)

< 0.001

KSS improvement (mean ± SD)

59.9 ± 30.0

24.9 ± 29.1

< 0.001

Preoperative FTA (°) (mean ± SD)

180.6 ± 3.6

181.6 ± 3.5

0.319

Postoperative FTA (°) (median (LQ, UQ))

176 (175, 178)

177 (176, 178)

0.240

Varus correcting (°) (mean ± SD)

3.9 ± 3.6

4.4 ± 3.6

0.657

Angle A (ED:AD)

0:73

0:14

Angle B (ED:AD)

3:70

2:12

0.181

Angle E (ED:AD)

17:56

8:6

0.020

Angle F (ED:AD)

2:71

1:13

0.413

Prosthesis overhang (yes:no)

4:69

1:13

1.000

Prosthesis loosening (yes:no)

0:73

0:14

Postoperative complications (yes:no)

5:68

1:13

1.000

  1. SD standard deviation, BMI body mass index, SONK spontaneous osteonecrosis of the knee, TSO time since operation, NRS Numerical Rating Scale, LQ lower quartile, UQ upper quartile, KSS Knee Society Score, FTA femorotibial angle, ED excessive deviation, AD allowable deviation.