Italian Registry of Allergen ImmunoTherapy

Objectives include:

• Evaluate short and long-term real-life effectiveness and safety of AIT overall, in specific patient groups' phenotypes and with specific AIT products.
• Evaluate the pertinence and differences in suggesting AIT to a patient comparing physician's evaluation in various settings with established international guidelines, describing the factors associated with treatment choices and changing over time, and promoting interoperability, data sharing, and cross-comparison among centers.
• Describe long-term respiratory allergic disease evolution in patients treated with AIT.
• Describe the natural history of the patient population with respiratory allergies and identify patient groups describing their illness burden, management patterns, and clinical progression.
• Promote the creation of accurate, standardized, and efficient processes for diagnosing and treating respiratory allergic diseases, especially with AIT.
• Assess biomarker data to predict diagnosis, treatment response and long-term disease progression.

Inclusion criteria

• Age ≥ 1 year
• Confirmed diagnosis of allergic rhinoconjunctivitis and/or allergic asthma according to EAACI 2019 guidelines.
• Having been followed by the recruiting center for at least one month: this is considered necessary to establish that the patients are truly affected by allergic respiratory disease and are eligible for allergen-specific immunotherapy; in this period, screening tests are carried out to exclude and/or confirm concomitant diseases (comorbidities). In fact, according to the aforementioned EAACI guidelines, a patient can be defined as truly eligible for allergen-specific immunotherapy only after a preliminary phase in which the patient is treated with symptomatic therapy; this observation period allows a correct evaluation of the real adherence and response to therapy, as well as the identification and appropriate treatment of any comorbidity and the possible elimination of aggravating factors.
• Having received the prescription of any of the available AIT products in Italy, irrespectively of the selected allergens and the administration route and schedule.

Exclusion criteria

There will no be exclusion criteria, in order to allow a real-life vision of the characteristics of these patients eligible for or treated with allergen-specific immunotherapy.