False-negative chest radiographs in emergency department diagnosis of pneumonia

Brandon C. Maughan, Nicholas Asselin, Jennifer L. Carey, Andrew Sucov, Jonathan H. Valente

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


BACKGROUND: Emergency department (ED) patients frequently undergo chest x-ray (CXR) to evaluate for pneumonia. The rate of false-negative CXR in patients with pneumonia is unclear.

OBJECTIVES: Identify patients admitted with pneumonia who were diagnosed by CT despite nondiagnostic CXR.

METHODS: Retrospective analysis of quality improvement data on adult ED patients admitted with pneumonia over 21 months. Primary outcome was percent of patients diagnosed by CT despite normal CXR. Patients were classified as CXR-diagnosed if they had CXR and no CT, or if antibiotics were ordered after CXR and before CT. CT-based diagnosis was indicated by administration of antibiotics only after CT was completed.

RESULTS: 49 patients (11.4%) were diagnosed by CT (p<0.001). These patients were younger (p<0.001) and more often complained of chest pain (p<0.001).

CONCLUSIONS: Patients with pneumonia may present with normal or nondiagnostic CXR, although false negatives may be less common than previously reported.

Original languageEnglish (US)
Pages (from-to)20-23
Number of pages4
JournalRhode Island medical journal (2013)
Issue number8
StatePublished - Aug 1 2014
Externally publishedYes


  • chest radiograph
  • computed tomography
  • false negative
  • pneumonia

ASJC Scopus subject areas

  • General Medicine


Dive into the research topics of 'False-negative chest radiographs in emergency department diagnosis of pneumonia'. Together they form a unique fingerprint.

Cite this