Emphysema: Sensitivity and Specificity

Introduction: None written.

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Prevalence

Population / Calculator	Prevalence	Comments / Study / Link
	6.3%
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The sensitivity and specificity of findings for Emphysema are listed below. See the left navigation bar to change the display.

Sensitive Findings

Chest CT

Sensitivity = 96%

Study population: patients with CT, CXR, and PFTs done within a short timespan (virtually all smokers). Standard was decreased diffusion capacity and airway obstruction by PFTs. Note that these findings were also found in 69% of patients in this study with normal PFTs.

Study: Invest Radiol. 1988 Apr;23(4):262-6. PMID: 3372190

Poorly Diagnostic Findings

Chest X-Ray

Sensitivity = 68%

Study population: patients with CT, CXR, and PFTs done within a short timespan (virtually all smokers). Arterial deficiency and bullae on CXR for decreased diffusion capacity and airway obstruction by PFTs.

Study: Invest Radiol. 1988 Apr;23(4):262-6. PMID: 3372190