Objective: The present study aimed to investigate the in vivo activity of nasal irrigation (NI) with saline, NI with povidone-iodine (PVP-I) 1%, NI with a mix of hypertonic alkaline and PVP-I 1% against Severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2).
Design: This study was a prospective randomised clinical trial.
Setting: A multicenter study involving tertiary care centres.
Objectives: Validation of the translations of questionnaires from foreign languages is important. Failure to validate surveys can lead to misapplication.
Methods: A total of 64 patients who presented with nasal obstruction due to chronic rhinosinusitis with nasal polyps and 64 control subjects were included in this prospective instrument validation study.