Table 2.

Procalcitonin Levels Across Final Diagnoses in Study Population

Diagnosis	PCT Median (95% CI), ng/mL	No. (%)
Pneumonia (bacterial)	0.68 (0.29-1.09)	65 (15.8)
Respiratory infection (viral)	0.10a (0.06-0.21)	34 (8.3)
Pneumonia (NOS)	0.19a (0.11-0.29)	68 (16.5)
Respiratory infection (other)	0.05b (0.05-0.15)	33 (8.0)
Sepsis	0.41 (0.23-0.75)	81 (19.7)
Other infection	0.09a (0.05-0.34)	23 (5.6)
No infection	0.08b (0.05-0.19)	108 (26.2)

CI, confidence interval; NOS, organism not specified; PCT, procalcitonin.

^a P < .01 in a Kruskal-Wallis test vs bacterial pneumonia.

^b P < .0001 in a Kruskal-Wallis test vs bacterial pneumonia.