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 ...

The equations used to determine percent predicted FEV1 and forced vital capacity (FVC) adjust for age, sex, height, and race (white, Black, North East Asian, South East Asian, or other).

(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 ...