FEV1/FVC Ratio (Tiffeneau Index): Age Trend

Median FEV1/FVC ratio falls from about 0.84 in men's 20s to 0.75 by their 80s, and from 0.87 to 0.77 in women across the same span.

Data source: Quanjer et al. (GLI-2012) (2012) · n=97.8K About this study

FEV1/FVC Ratio (Tiffeneau Index) Respiratory Trend

FEV1/FVC Ratio (Tiffeneau Index) by Age Chart

FEV1/FVC Ratio (Tiffeneau Index) Median Values

Age Male Female
7.5 0.894 0.909
12.5 0.864 0.892
17.5 0.864 0.893
25 0.843 0.866
35 0.819 0.837
45 0.800 0.813
55 0.785 0.800
65 0.771 0.789
75 0.758 0.778
85 0.747 0.769

Browse by Demographics

Related Metrics