Table 1.

Differences Between Immigrant and Nonmigrant-Resident Allergic Respiratory Diseases That Suggest the Possibility of Distinct ''United Airways Disease'' Phenotype

Parameter	Immigrants	Nonmigrants/Residents
Severity grade of allergic respiratory diseases	Moderate-high	Variable
Rhinitis and asthma comorbidity	Very high	Moderate-high
Allergen polysensitization-monosensitization ratio	High	Moderate
Cockroach sensitization (Italy data)	High	Low
Drug and/or food allergy	Low	Moderate-high
Compliance to therapy	Low	Moderate-high
Previous familial history of atopy	Low	Moderate-high