FEV1/FVC Ratio (Tiffeneau Index): Females, Age 80+
What these numbers mean
A value around 0.769 is typical (50th percentile) for females in this age group. The middle 50% of the reference population fall between about 0.709 and 0.826; values below or above that central range sit in the lower or upper half of the distribution. Position in the distribution does not, on its own, indicate better or worse health for this metric.
Data source: Quanjer et al. (GLI-2012) About this study
FEV1/FVC Ratio (Tiffeneau Index) Respiratory Females 80+
FEV1 FVC ratio Tiffeneau Tiffeneau-Pinelli index spirometry obstructive lung disease COPD asthma airflow obstruction pulmonary function norms normative data normative values reference values percentiles benchmarks reference ranges standards FEV1/FVC Ratio (Tiffeneau Index) Percentile Chart
This percentile chart shows how common a value is, not whether it is healthy.