RT Journal Article SR Electronic T1 The burden of severe asthma in childhood and adolescence: results from the paediatric U-BIOPRED cohorts JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP ERJ-00780-2015 DO 10.1183/13993003.00780-2015 A1 Fleming, Louise A1 Murray, Clare A1 Bansal, Aruna T. A1 Hashimoto, Simone A1 Bisgaard, Hans A1 Bush, Andrew A1 Frey, Urs A1 Hedlin, Gunilla A1 Singer, Florian A1 van Aalderen, Wim M. A1 Vissing, Nadja H. A1 Zolkipli, Zaraquiza A1 Selby, Anna A1 Fowler, Stephen A1 Shaw, Dominick A1 Chung, Kian Fan A1 Sousa, Ana R. A1 Wagers, Scott A1 Corfield, Julie A1 Pandis, Ioannis A1 Rowe, Anthony A1 Formaggio, Elena A1 Sterk, Peter J. A1 Roberts, Graham YR 2015 UL http://erj.ersjournals.com/content/early/2015/09/24/13993003.00780-2015.abstract AB U-BIOPRED aims to characterise paediatric and adult severe asthma using conventional and innovative systems biology approaches.A total of 99 school-age children with severe asthma and 81 preschoolers with severe wheeze were compared with 49 school-age children with mild/moderate asthma and 53 preschoolers with mild/moderate wheeze in a cross-sectional study.Despite high-dose treatment, the severe cohorts had more severe exacerbations compared with the mild/moderate ones (annual medians: school-aged 3.0 versus 1.1, preschool 3.9 versus 1.8; p<0.001). Exhaled tobacco exposure was common in the severe wheeze cohort. Almost all participants in each cohort were atopic and had a normal body mass index. Asthma-related quality of life, as assessed by the Paediatric Asthma Quality of Life Questionnaire (PAQLQ) and the Paediatric Asthma Caregiver's Quality of Life Questionnaire (PACQLQ), was worse in the severe cohorts (mean±se school-age PAQLQ: 4.77±0.15 versus 5.80±0.19; preschool PACQLQ: 4.27±0.18 versus 6.04±0.18; both p≤0.001); however, mild/moderate cohorts also had significant morbidity. Impaired quality of life was associated with poor control and airway obstruction. Otherwise, the severe and mild/moderate cohorts were clinically very similar.Children with severe preschool wheeze or severe asthma are usually atopic and have impaired quality of life that is associated with poor control and airflow limitation: a very different phenotype from adult severe asthma. In-depth phenotyping of these children, integrating clinical data with high-dimensional biomarkers, may help to improve and tailor their clinical management.Children with severe preschool wheeze or severe asthma are usually atopic and have impaired quality of life http://ow.ly/RrrGE