%0 Journal Article %T Minimally important differences and risk levels for the Composite Asthma Severity Index %A Agustin Calatroni %A Andrew H. Liu %A Christine A. Sorkness %A Edward M. Zoratti %A Gurjit K. Khurana Hershey %A Jeremy J. Wildfire %A Joseph B. West %A Melanie Makhija %A Meyer Kattan %A Peter J. Gergen %A Rebecca Gruchalla %A Rebecca Z. Krouse %A Robert A. Wood %A Stephen J. Teach %J Journal of Allergy and Clinical Immunology %D 2017 %R 10.1016/j.jaci.2016.08.041 %X The Composite Asthma Severity Index (CASI) is a comprehensive severity scale combining multiple facets of asthma severity: impairment, risk, and treatment.1 The CASI score, which was developed as a research tool for intervention studies, ranges from 0 to 20 points, with higher scores indicating higher levels of severity, and includes 5 domains: day symptoms and albuterol use, night symptoms and albuterol use, controller treatment, lung function measures, and exacerbations. This report expands on the introduction of the CASI score in Wildfire et£¿al1 by determining risk levels, the minimally important difference (MID), and the suggested effect size for the score. %U https://www.jacionline.org/article/S0091-6749(16)31125-3/abstract