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Background: Small airways dysfunction (SAD) asthma is a relatively new and emerging phenotype of asthma that has distinct clinical manifestations. Lung oscillometry is a sensitive tool that detects SAD using the R5-R20 parameter. We aimed to study the prevalence of SAD in the Indian asthmatic population using lung oscillometry. Methods: The International Network for Lung Oscillometry Research (ARISE) that comprises of 31 sites across India was established for generating new knowledge in the emerging field of lung oscillometry. Oscillometry was performed in patients routinely visiting the respiratory clinics using the Antlia FOT device (iCALTECH, Bangalore. India) according to the ERS 2019 standards. We collated preliminary data from adult male and female asthmatic subjects visiting 3 respiratory clinics. Spirometry data was available for a subset of patients. In the absence of standard cut-off values for R5 …