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Table 3 Diagnostic performance of a combination of CRP (mg/L) and Platelet (109/L) tests for GCA

From: The utility of ESR, CRP and platelets in the diagnosis of GCA

Diagnostic Performance

Test Criteria

CRP > = 20 or Platelets > = 300

CRP > = 20 and Platelets > = 300

Sensitivity%

87.1 (80.3, 92.1)

51.1 (42.5, 59.6)

Specificity%

46.6 (37.8, 55.5)

84.0 (76.5, 89.8)

PPV%

63.4 (56.1, 70.2)

77.2 (67.2, 85.3)

NPV%

77.2 (66.4, 85.9)

61.8 (54.2, 69.0)

% Correct

67.4

67.4

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BMC Rheumatology

ISSN: 2520-1026

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