Table 4

Area under the curve (AUC) of receiver operating curve (ROC) characteristic plot analysis.

Parameter

AUC

95% CI*

P-value

Optimal cut off

Sensitivity

Specificity


Combined Score

0.86

0.81–0.90

-

< 2

78.0

78.8


Temperature

0.74

0.63–0.78

<0.0001

> 39.4

48.1

84.4

No sputum

0.68

0.61–0.74

<0.0001

-

-

-

Sodium

0.71

0.63–0.78

<0.0001

< 133

64.6

70.8

Lactate dehydrogenase

0.62

0.53–0.71

<0.0001

> 225

67.1

58.1

C-reactive protein

0.76

0.70–0.82

<0.0001

> 187

71.6

64.7

Platelet counts

0.71

0.64–0.78

<0.0001

< 171

45.7

83.6


*CI denotes confidence interval;

Fiumefreddo et al. BMC Pulmonary Medicine 2009 9:4   doi:10.1186/1471-2466-9-4

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