FEV1/FVC Ratio (Tiffeneau Index): Age Trend
Page updated: Evidence reviewed: What this means
GLI-2012 ratio point estimates generally decline from age 25 through the last plotted calculation at age 85.
Data source: Quanjer et al. (GLI-2012) About this study
See also: NHANES 2015-2018 median heights (FitnessNorms derivation) 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 | 0.886 | 0.905 |
| 10-14 | 0.858 | 0.890 |
| 15-19 | 0.865 | 0.894 |
| 20-29 | 0.843 | 0.865 |
| 30-39 | 0.819 | 0.837 |
| 40-49 | 0.800 | 0.813 |
| 50-59 | 0.785 | 0.800 |
| 60-69 | 0.770 | 0.788 |
| 70-79 | 0.756 | 0.778 |
| 80+ | 0.746 | 0.768 |