Radiologic Findings Are Strongly Associated with a Pathologic Diagnosis of Usual Interstitial Pneumonia

Gary W. Hunninghake, David A. Lynch, Jeffrey R. Galvin, Barry H. Gross, Nestor Müller, David A. Schwartz, Talmadge E. King, Joseph P. Lynch, Richard Hegele, James Waldron, Thomas V. Colby, James C. Hogg

Research output: Contribution to journalArticlepeer-review

233 Scopus citations


Purpose: To determine which clinical and radiologic findings are independently associated with a pathologic diagnosis of usual interstitial pneumonia (UIP). Methods: We recently reported, using a prospective, multicenter study of patients suspected of having idiopathic interstitial pneumonia (IIP), that a confident diagnosis of UIP made by experienced radiologists was correct in 95% of cases. In the current article, we further analyzed data from this study. Ninety-one patients were entered into the study. Clinical, physiologic, chest radiographic, and CT features were prospectively recorded, and analyzed using univariate and multivariate logistic regression analysis to compare the patients with a histologic diagnosis of UIP with those who received other pathologic diagnoses. Results: Fifty-four of 91 patients (59%) received a pathologic diagnosis of UIP. The following features recorded at the referring clinical centers were associated with a pathologic diagnosis of UIP on multivariate analysis: lower-lobe honeycombing on high-resolution CT (HRCT) [odds ratio, 11.45], radiographic findings consistent with UIP (odds ratio, 5.73), elevated ratio of FEV1 to FVC (odds ratio, 4.8), and absence of smoking history (odds ratio, 0.19). On multivariate analysis of specific HRCT features recorded by four experienced chest radiologists, lower-lung honeycombing (odds ratio, 5.36) and upper-lung irregular lines (odds ratio, 6.28) were the only independent predictors of UIP. Using only these two factors, a diagnosis of UIP could be established with a sensitivity of 74%, a specificity of 81%; and a positive predictive value of 85%. Conclusion: In patients presenting with a clinical syndrome suggestive of IIP, CT findings of lower-lung honeycombing and upper-lung irregular lines are most closely associated with a pathologic diagnosis of UIP.

Original languageEnglish (US)
Pages (from-to)1215-1223
Number of pages9
Issue number4
StatePublished - Oct 2003


  • Chest radiograph
  • Idiopathic interstitial pneumonia
  • Idiopathic pulmonary fibrosis
  • Interstitial lung disease
  • Lung
  • Lung CT scans
  • Thorax
  • Usual interstitial pneumonia

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine
  • Cardiology and Cardiovascular Medicine


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