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) About this study
FEV1/FVC Ratio (Tiffeneau Index) Respiratory Trend
FEV1 FVC ratio Tiffeneau Tiffeneau-Pinelli index spirometry obstructive lung disease COPD asthma airflow obstruction pulmonary function trend aging norms normative data normative values reference values percentiles benchmarks reference ranges standards FEV1/FVC Ratio (Tiffeneau Index) by Age Chart
FEV1/FVC Ratio (Tiffeneau Index) Median Values
| Age | Male | Female |
|---|---|---|
| 5-9 | 0.894 | 0.909 |
| 10-14 | 0.864 | 0.892 |
| 15-19 | 0.864 | 0.893 |
| 20-29 | 0.843 | 0.866 |
| 30-39 | 0.819 | 0.837 |
| 40-49 | 0.800 | 0.813 |
| 50-59 | 0.785 | 0.800 |
| 60-69 | 0.771 | 0.789 |
| 70-79 | 0.758 | 0.778 |
| 80+ | 0.747 | 0.769 |