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Table 3 Subgroup analysis and respective diagnostic performance

From: Sonication of retrieved implants improves sensitivity in the diagnosis of periprosthetic joint infection

subgroup

 

sensitivity (%)

specificity (%)

SFC

PTC

p1

SFC

PTC

p

overall (EBJIS)

 

69.0

62.8

.04

90.2

92.9

.65

overall (ICM 2018)

87.5

84.4

.63

85.1

92.5

.05

joint

 

hip (n = 143)

70.4

63.0

.24

91.9

90.3

1.00

 

knee (n = 89)

65.4

53.8

.15

91.9

94.6

1.00

 

other (n = 25)

75.0

66,7

1.00

76.9

100.0

/2

previous AB3 treatment

 

antibiotics (n = 63)

72.3

57.4

.12

100.0

100.0

/

no antibiotics (n = 194)

67.3

61.2

.36

88.5

91.7

.65

introduction to removal

 

early (n = 104)

76.5

67.6

.36

94.4

91.7

1.00

delayed (n = 72)

65.0

60.0

.75

78.1

93.7

.18

late (n = 81)

59.5

45.9

.06

95.5

93.2

1.00

  1. 1 McNemar’s test of paired proportions. P values in italics. A p value <.05 indicates statistical significance. SIgnificant values are displayed in fat.
  2. 2 /, not applicable
  3. 3 AB, antibiotic