What question did this study set out to answer?

The aim is to investigate the utility of central and peripheral concavity indices in predicting respiratory symptoms and COPD risk.

May 7, 2026Open Access

An index of maximal expiratory flow–volume curve with different features related to central and peripheral concavity

Puntos clave

The aim is to investigate the utility of central and peripheral concavity indices in predicting respiratory symptoms and COPD risk.
Analyzed population-based cohort data focusing on maximal expiratory flow-volume curves.
Evaluated central and peripheral concavity indices as potential risk markers for respiratory symptoms.
Concavity indices are significant indicators for assessing future respiratory symptoms.
Findings suggest a strong correlation between concavity measures and the incidence of COPD.

Resumen

Extract We read the recent article by Tan et al. 1 entitled “Concavity of the maximal expiratory flow–volume curve, and incidence of COPD and respiratory symptoms: a population-based cohort study”, published in ERJ Open Research. This is an intriguing study demonstrating that the concavity indices, central concavity and peripheral concavity, are useful markers for assessing the future risk of respiratory symptoms.

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