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Table 1 Patient and procedure characteristics at primary TKA relative to the four procedure duration groups

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

 

Procedure Duration Groups

 
 

< 75 min

75 – 89

90 – 109

≥110

p-value

Number of procedures

5680

6238

8659

7685

 

Year of operation 2010-2014 (n = 15,900) %

60

58

57

52

P < 0.001

Male sex (n = 10,186) %

28

31

37

44

P < 0.001

Age group %

    

P < 0.001

<60 (n = 4989)

15

17

17

21

 

60-69 (n = 9717)

33

34

34

36

 

70-79 (n = 10,009)

38

36

36

32

 

≥80 (n = 3547)

14

13

13

11

 

Median age (years) (range)

71 (31-96)

70 (25-94)

70 (23-101)

68 (22-93)

 

Median annual hospital volume

118

113

95

86

P < 0.001

ASA %

    

P = 0.001

1 (n = 4167)

16

14

14

16

 

2 (n = 17,918)

64

65

64

62

 

3+ (n = 5621)

19

19

20

21

 

Osteoarthritis (n = 25,152) %

92

90

88

87

P < 0.001

Perioperative complications (n = 640) %

0.7

1.1

1.8

4.9

P < 0.001

Previous surgery for intraarticular fracture or fracture near the joint (n = 551) %

0.8

1.3

1.7

3.6

P < 0.001

Previous high tibial osteotomy (n = 885) %

1.9

2.5

2.8

4.9

P < 0.001

Computer navigated TKA (n = 2462) %

2.5

5.6

9.0

18

P < 0.001

Systemic antibiotics (n = 28,108) %

100

100

100

100

P = 0.4

Prosthesis brand %

    

P < 0.01

LCS Complete (n = 8752)

26

31

31

34

 

Profix (n = 6286)

23

24

23

20

 

NexGen (n = 4717)

18

16

16

17

 

AGC (n = 2233)

15

7.3

6.1

5.1

 

Duracon (n = 2043)

5.7

6.8

6.8

9.2

 

Triathlon (n = 1317)

5.2

4.0

5.2

4.1

 

Vanguard (n = 741)

1.5

1.7

3.7

3.0

 

PFC-Sigma (n = 697)

1.3

2.6

3.0

2.7

 

LCS (n = 516)

1.3

1.2

2.0

2.5

 

Other (n = 955)

3.3

5.0

2.9

2.7