Visual analog scale has comparable validity for perennial allergic, nonallergic rhinitis

The visual analog scale (VAS) demonstrates comparable validity for perennial allergic rhinitis (PAR) and nonallergic rhinitis (NAR) severity and quality-of-life (QoL) impairment, according to a study published online Dec. 23 in The Journal of Allergy and Clinical Immunology: In Practice.

This article was originally published on MedicalXpress.com

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