Table 1 Challenges in Determining the Prevalence of Vasomotor Rhinitis

Agreement on VMR definition

Requirement to rule out all other forms of rhinitis

Requirement to rule out chronic rhinosinusitis

Skin testing or determination of serum-specific IgE is required

Local IgE production without systemic detection may be present (entopy)[2]

Sinus imaging is rarely assessed in large epidemiologic studies

Nasal cytology is rarely assessed in large epidemiologic studies