Regression of FEV1 (L), FVC (L), FEV1 percentage of predicted and FVC percentage of predicted, by gender, The English Longitudinal Study of Ageing, England, 2004 to 2013.
+Prevalences and means are adjusted for age (age is unadjusted). *FEV ratio is the ratio of measured FEV divided by predicted FEV calculated from subjects’ age and height based on an equation derived
