GOLD spirometric grade (COPD)
Airflow obstruction severity from post-bronchodilator spirometry.
Inputs
0 of 2%
When to use
- Post-bronchodilator spirometry in suspected or known COPD.
Pearls and pitfalls
- A fixed 0.70 ratio overdiagnoses older adults; some labs use the lower limit of normal.
Why use
The standard COPD severity language.
Obstruction if FEV₁/FVC < 0.70; grade by FEV₁ % predicted: ≥ 80 GOLD 1, 50–79 GOLD 2, 30–49 GOLD 3, < 30 GOLD 4