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Table 3 Cox regression analysis. Risk of revision due to deep infection for all TKA patients in four different procedure duration groups

From: Patient and surgical factors affecting procedure duration and revision risk due to deep infection in primary total knee arthroplasty

 

Cox regressionc

Unadjusted

Adjusted

Procedure duration

No of TKA

No of revisionsa

K-M 1y %b

K-M 4y %b

HR (95% CI)

p-value

HR (95% CI)

p-value

      

0.01d

 

0.03d

<75

5680

48

0.60

0.89

1

 

1

 

75-89

6238

54

0.58

0.85

1.1 (0.7 - 1.5)

1.0

1.0 (0.7 - 1.4)

0.9

90-109

8659

91

0.63

1.01

1.2 (0.9 – 1.7)

0.3

1.1 (0.8 – 1.6)

0.5

≥110

7685

118

0.91

1.38

1.8 (1.3 – 2.5)

0.001

1.5 (1.0 – 2.1)

0.03

  1. aNumber of revisions due to deep infection (n = 311)
  2. bKaplan-Meier estimated proportion of revisions due to deep infection at 1 and 4 years follow-up
  3. cUnadjusted and adjusted Hazard ratios (HR) estimated with the Cox proportional hazards model (adjusted for sex, age, diagnosis, ASA classification and perioperative complications
  4. dOverall test for group differences
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BMC Musculoskeletal Disorders

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