Several factors can influence FEV1 values, including:
Age: FEV1 generally decreases with age. Sex: Males typically have higher FEV1 values than females. Height: Taller individuals tend to have higher FEV1 values. Ethnicity: Predicted FEV1 values can vary between ethnic groups. Environmental Factors: Exposure to pollutants and allergens can lower FEV1. Lifestyle Factors: Smoking and physical inactivity can negatively impact FEV1.
