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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
As per GOLD criteria, COPD is termed very severe when FEV1 is
assistant
The correct answer is  GOLD Criteria for Severity of Airflow Obstruction in COPDGOLD stageSeveritySpirometryIMildFEV1/FVC <0.7 and FEV1 >=80% predictedIIModerateFEV1/FVC <0.7 and FEV1 >=50% but <80%predictedIIISevereFEV1/FVC <0.7 and FEV1 >=30% but <50%predictedIVVery severeFEV1/FVC <0.7 and FEV1 <30% predictedRef: Harrison 19e pg: 1704