Impact of Demographic and Clinical Subgroups in Google Trends Data: Infodemiology Case Study on Asthma Hospitalizations

Diana Portela   ^{1, 2} , MD ;   Alberto Freitas   ^{1, 2} , PhD ;   Elísio Costa   ^{2, 3} , PhD ;   Mattia Giovannini   ^{4, 5} , MD ;   Jean Bousquet   ^{6, 7, 8} , PhD ;   João Almeida Fonseca   ^{1, 2} , MD, PhD ;   Bernardo Sousa-Pinto   ^{1, 2} , PhD

¹ Department of Community Medicine, Information and Health Decision Sciences, Faculty of Medicine, University of Porto, Porto, Portugal

² Center for Health Technologies and Services Research, Health Research Network, University of Porto, Porto, Portugal

³ Research Unit on Applied Molecular Biosciences, Faculty of Pharmacy, University of Porto, Porto, Portugal

⁴ Allergy Unit, Department of Pediatrics, Meyer Children’s Hospital, Istituto di Ricovero e Cura a Carattere Scientifico, Florence, Italy

⁵ Department of Health Sciences, University of Florence, Florence, Italy

⁶ Institute of Allergology, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany

⁷ Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin, Germany

⁸ MASK-air, Montpellier, France