To determine if serum procalcitonin (ProCT) could assist in managing patients with respiratory illness and indeterminate radiographs. Design: Subjects were prospectively enrolled during 2 ...

For our analysis, chest radiographs were categorized into 4 groups: (1) "No acute disease" (NAD) (ie, clear or no change from prior radiographs); (2) "Other" definitive radiographic abnormality ...