BACKGROUND: The study aimed to evaluate the level of agreement between specialists in pediatric allergology regarding the diagnosis and indications for allergen immunotherapy (AIT) for dust mites, molds, animal dander, and Hymenoptera venom allergen, as well as mixtures of several allergen sources in polysensitized children in Spain. MATERIALS AND METHODS: A Delphi study was performed using an online survey designed by a committee of pediatric AIT experts: 46 and 44 panelists participated in Rounds 1 and 2, respectively. In Round 1, 204 statements on 8 dimensions were evaluated (Diagnosis, Therapeutic management, and Pollens - Part I
Mites, molds, animals, hymenoptera venom, and mixtures - Part II). A total of 148 statements were finally accepted after Round 2. Panel members rated their level of agreement with assessments on a 9-point Likert scale based on acceptance by ≥ 66.7 of them. RESULTS: Panel experts recommended molecular diagnosis for dust mite allergy diagnosis in polysensitized pediatrics and mixtures of nonhomologous mites ( CONCLUSIONS: This Delphi study provides, where evidence is lacking, current expert-based opinions on clinical decision-making for managing polysensitized children.