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Table 1 Patient characteristics of the groups

From: Is the use of computer navigation in total knee arthroplasty improving implant positioning and function? A comparative study of 198 knees operated at a Norwegian district hospital

 

CON

CAOS

P-value

Number of patients

95

103

 

Mean age (min-max)(SD)

70.1 (49.0-89.5)(9.1)

68.7 (42.6-88.5)(9.2)

0.87

Sex (% female)

66.3%

50.5%

0.02

Pre-operative EQ-5D index score (SD)

49.3 (19.4)

45.1 (22.3)

0.21

ASA score

   

  1

10

9

<0.01

  2

53

83

  3

19

9

  Unknown

13

2

Type of prosthesis

   

Profix cemented

58

26

<0.01

Profix uncemented

4

63

Profix reversed hybrid

0

1

Profix hybrid

33

13

Operation time (min-max)(SD)

101.2 (57–250)(23.6)

90 (53–140)(17.4)

<0.01

Charnley category

   

  A

19

33

0.57

  B

10

16

  C

35

42

  Unknown

31

12

Diagnosis

   

  Osteoarthritis

90

98

0.98

  Rheumatoid arthritis

1

1

  Other

4

4