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Table 3 Comparison of complications before and after propensity score matching

From: Thromboembolic and infectious complication risks in TKA and UKA: evidence from a Japanese nationwide cohort

 

Before PS matching

 

After PS matching

 
 

TKA

UKA

χ2 statistics

p-value

TKA

UKA

χ2 statistics

p-value

Deep vein thrombosis

21,262 (9.3%)

1882 (6.1%)

336.1

< 0.0001*

2681 (8.8%)

1876 (6.1%)

153.6

< 0.0001*

Pulmonary embolism

686 (0.3%)

45 (0.2%)

22.7

< 0.0001*

77 (0.3%)

45 (0.3%)

8.4

0.0037*

Cerebrovascular disorder

812 (0.4%)

74 (0.2%)

10.4

0.001*

104 (0.3%)

74 (0.2%)

5.1

0.024

Cognitive dysfunction

1713 (0.8%)

123 (0.4%)

46.9

< 0.0001*

221 (0.7%)

122 (0.4%)

28.7

< 0.0001*

Pneumonia

444 (0.2%)

28 (0.1%)

15.8

< 0.0001*

54 (0.2%)

27 (0.1%)

9.0

0.0027

Surgical site infection

2739 (1.2%)

228 (0.7%)

49.8

< 0.0001*

340 (1.1%)

228 (0.7%)

22.3

< 0.0001*

Periprosthetic fracture

139 (0.1%)

47 (0.2%)

32.1

 < 0.0001*

19 (0.1%)

47 (0.2%)

11.9

0.0006*

  1. One-to-one PS matching was performed
  2. *P-values of < 0.01 are considered significant by the χ2 test; PS propensity score
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Knee Surgery & Related Research

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