What is the FEV1 ratio range for moderate persistent asthma?

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Multiple Choice

What is the FEV1 ratio range for moderate persistent asthma?

Explanation:
The main idea is that asthma severity is linked to how much airflow remains limited, as shown by FEV1 percent predicted after a bronchodilator. In moderate persistent asthma, the FEV1 is about 60% to 80% of what’s predicted for the person’s age, height, and sex. This reflects a clear but not severe reduction in expiratory airflow. Values ≥80% are typically seen with mild intermittent or mild persistent asthma, while values below 60% indicate more severe obstruction. So 60–80% best fits moderate persistent asthma.

The main idea is that asthma severity is linked to how much airflow remains limited, as shown by FEV1 percent predicted after a bronchodilator. In moderate persistent asthma, the FEV1 is about 60% to 80% of what’s predicted for the person’s age, height, and sex. This reflects a clear but not severe reduction in expiratory airflow. Values ≥80% are typically seen with mild intermittent or mild persistent asthma, while values below 60% indicate more severe obstruction. So 60–80% best fits moderate persistent asthma.

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