Percent Predicted Forced Expiratory Flow at 25-75 Percent

**Semantic type:** Quantitative Concept

**Definition:** The mean forced expiratory flow rate at 25-75% of the forced vital capacity as a proportion of the predicted normal value.

**Synonyms:** - FEF at 25-75% - FEF2575P - Percent Predicted FEF25-75 - Percent Predicted FEF25-75