The association of subjective nasal patency with peak inspiratory nasal flow in a large healthy population.

This study, performed on 303 healthy volunteers, tested the null hypothesis that normal subjects were unable to assess their nasal patency when compared with objective measurement using peak inspiratory nasal flow rate (PINFR). Subjective assessments were made on a categorical scale and PINFR was measured using an In-Check meter. Analysis of variance showed that the peak inspiratory nasal flow rate, when grouped by the subjective scores, was significantly different.