Distribution and determinants of Preserved Ratio Impaired Spirometry( PRISm) in smokers attending a tertiary care centre in South India
Background Preserved Ratio Impaired Spirometry (PRISm) is an increasingly recognized spirometric phenotype characterized by reduced forced expiratory volume in one second (FEV₁) despite a preserved FEV₁/forced vital capacity (FVC) ratio. It has been associated with obesity, smoking, metabolic disorders, and increased...