Table 4 Discriminatory accuracy of procalcitonin and C-reactive protein for detection of bacterial pneumonia ^a

Total (N = 161)

0.72

0.64 to 0.80

<0.0001

–

Without antibiotics before admission (n = 91)

0.73

0.62 to 0.83

<0.0001

0.47

Without ECMO or renal replacement therapy (n = 110)

0.74

0.64 to 0.83

<0.0001

0.40

Without hospital-acquired pneumonia (n = 131)

0.76

0.68 to 0.84

<0.0001

0.25

Without immune-compromising disorder (n = 140)

0.74

0.65 to 0.82

<0.0001

0.40

Without hospital-acquired pneumonia and

0.76

0.68 to 0.85

<0.0001

0.24

Without immune-compromising disorder (n = 124)

CRP (total population, n = 143)

0.64

0.55 to 0.73

0.003

0.10