Healthy values for FEV1 vary from person to person. They’re based on standards for an average person of that age, race, height, and gender. Each person has a predicted FEV1 value. You can get a ...

(197 males, mean age 59.2 [SD 9.6], mean FEV1 % predicted 62.8 [SD 17.6]). Pre-BD FEV1 was on average 79 ml (95% CI 55, 103) and FVC 99 ml (95% CI 54, 143) higher for the general practice ...