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UHERO
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FEV1
Participants’ FEV1 levels were measured during a health exam. FEV1 is a measure of how much air is let out in the first second when a person forcefully exhales. Low FEV1 can be a sign of obstructive lung disease (difficulty exhaling). The FEV1 readings were categorized to describe the risk of obstructive lung disease from normal (no risk) to mild, moderate, and severe risk of obstructive lung disease.
UHERO
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FEV1-FVC Ratio
The FEV1-FVC ratio is another measure of obstructive lung disease (difficulty exhaling). It compares the FEV1 value (how much air is let out in the first second when a person forcefully exhales) to the total amount of air that a person can forcefully exhale. A low FEV1-FVC ratio is a sign that a person’s lungs are damaged.