The rate of hypercapnic respiratory failure in a pulmonary function test laboratory database

Hypercapnia rates are in the range 3.6-12% among those with abnormal spirometry and FEV(1) ≥80% pred, and 53-58% among those with FEV(1) <35% pred. Both airflow obstruction and preserved ratio impaired spirometry are associated with higher risk of CHRF. https://bit.ly/3H8DlfM.