Understanding the 4 Stages of COPD: Mild to Very Severe #67670 (License: Personal Use)

The infographic displays four quadrants, each representing a COPD stage: Stage 1 (Mild, ≥80% FEV1), Stage 2 (Moderate, 50-79%), Stage 3 (Severe, 30-49%), and Stage 4 (Very Severe, <30% or chronic respiratory failure). Each stage includes a labeled lung illustration showing increasing bronchial narrowing and hyperinflation, alongside key clinical features like symptom frequency and exacerbation risk.

Used in patient education materials, pulmonology websites, and clinical guidelines to help patients and providers understand disease progression and inform treatment decisions. Matches user intent for learning about COPD staging, diagnosis criteria, or prognosis.