The prevalence, burden and risk factors associated with chronic obstructive pulmonary disease in Commonwealth of Independent States (Ukraine, Kazakhstan and Azerbaijan): results of the CORE study

Table 2 COPD diagnosis and severity based on spirometry outcomes (GOLD 20115)

Diagnosis	Post-dose parameters
No disease	FEV₁/FVC ≥ 0.70
COPD GOLD stage:
Stage I: Mild	FEV₁/FVC < 0.70 FEV₁ ≥ 80% predicted
Stage II Moderate:	FEV₁/FVC < 0.70 50% ≤ FEV₁ < 80% predicted
Stage III: Severe	FEV₁/FVC < 0.70 30% ≤ FEV₁ < 50% predicted
Stage IV: Very Severe	FEV₁/FVC < 0.70 FEV₁ < 30% predicted or FEV₁ < 50% predicted plus chronic respiratory failure

FEV₁ forced expiratory volume in one second; FVC forced vital capacity; respiratory failure: arterial partial pressure of oxygen (PaO₂) less than 8.0 kPa (60 mmHg) with or without arterial partial pressure of CO₂ (PaCO₂) greater than 6.7 kPa (50 mmHg) while breathing air at sea level

ISSN: 1471-2466