Outcome | Definition* |
---|---|
Spirometric criteria* | |
FIXED RATIO | Post-bronchodilator FEV1/FVC < 70% [10] |
GOLD | Post-bronchodilator FEV1/FVC < 70 and FEV1 < 80% of predicted value [10] |
ATS | Post-bronchodilator FEV1/FVC below the 5th percentile and FEV1 < 100% of predicted value [11] |
ERS | Post-bronchodilator FEV1/FVC < 88% of the predicted value for men and < 89% for women [12] |
Symptom-based criteria | |
Chronic bronchitis | Cough with phlegm for at least 3 months a year in the last 2 years |
Asthma | Wheezing within the last 12 months |
Emphysema | Breathlessness due to exercise |
Medical diagnosis | |
COPD | Reported lifetime diagnosis of COPD |
Chronic bronchitis | Reported lifetime diagnosis of chronic bronchitis |
Emphysema | Reported lifetime diagnosis of emphysema |
Asthma | Reported lifetime diagnosis of asthma |