A clinical sign of obstructive lung disease would be a reduced FEV1/FVC ratio.

Name: A clinical sign of obstructive lung disease would be a reduced FEV1/FVC ratio.
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A reduced FEV1/FVC ratio is a hallmark clinical sign of obstructive lung disease, as it indicates that the patient is having difficulty exhaling air due to narrowed airways. This can be seen in conditions such as asthma, chronic obstructive pulmonary disease (COPD), and bronchiectasis.

A Clinical Sign of Obstructive Lung Disease Would Be a Reduced