“…There were 36 included studies evaluating the correlation for nasal obstruction in CRS, AR, and DNS, covering 3 main objective measures: rhinomanometry, 19,30,31,35,48,49,52–55,57,61 AcR, 19,28,29,35,36,46,54,56,58 and PNIF 17,42,44,50,58,62 (12, 9, and 8 studies, respectively). A small number of publications (19%) utilized various uncommon and non‐validated measures for nasal obstruction 17,36,40–43,46,58 …”