Table 2 Sensitivity, Specificity, Positive and negative predictive values

Any CRP + ve

62.9% (49.7-74.8)

73.3% (67.2-78.7)

37.5% (28.2-47.5)

88.6% (83.3-92.6)

CRP day 1

40.3% (28.1-53.6)

82.7% (77.4-87.3)

37.5% (25.8-50.0)

84.5% (79.2-88.8)

CRP day 2

53.2% (40.1-66.0)

80.7% (75.1-85.4)

41.3% (30.4-52.8)

87.1% (82.0-91.2)

CRP day 3

54.8% (41.7-67.5)

77.8% (72.0-82.8)

38.6% (28.4-49.6)

87.1% (81.9-91.3)

WBC

64.5% (51.3-76.3)

66.7% (60.4-72.6)

33.1 (24.8-42.2)

88.4 (82.5-92.4)

Any CRP + WBC

90.3% (80.1-96.4)

50.2% (43.7-56.7)

31.6% (24.9-39.0)

95.3% (90.1-98.3)

CRP gram negative sepsis

75.0% (53.3-90.2)

73.3% (67.8-78.7)

21.7% (13.4-32.1)

96.7% (93.0-98.8)

CRP gram positive sepsis

55.3% (38.3-71.4)

73.2% (67.2-78.7)

24.4% (15.8-34.9)

91.3% (86.4-94.8)