Validity
asthma
ASTHMA
Construct validity was acceptable between individual and composite VAS and the SNOT-22 total score (r = 0.461–0.598), and between individual symptom VAS and corresponding SNOT-22 items (r = 0.560–0.780), exceeding a priori hypothesized correlations (Additional file Known-groups validity assessment demonstrated generally acceptable validity based on comorbid asthma, blood eosinophil count and N-ERD. Statistically significant between-group differences (F-test 