title: Identifying high-risk asthma with utilization data: a revised HEDIS definition.
abstract: OBJECTIVE
  To develop a definition of high-risk asthma that more precisely identifies patients needing case management than the 2006 Healthcare Effectiveness Data and Information Set (HEDIS) definition.
  
  
  METHODS
  Two-year claims-based study, with cross-sectional phone survey data, for a sample of 769 youths (age 11-17 years) with asthma.
  
  
  METHODS
  The 2006 HEDIS measure defines high-risk asthma as meeting any of the following criteria: >1 emergency department (ED) visits, > or =1 hospitalizations for asthma, > or =4 asthma medication prescriptions, or > or =4 ambulatory visits for asthma with > or =2 prescriptions for asthma medication in 1 year. We created a revised definition (> or =1 ED visits or > or =1 hospitalizations for asthma or > or =1 oral steroid prescriptions for asthma) and identified patients with high-risk asthma in year 1 according to each definition. We compared the 2 groups on demographic and clinical characteristics, and healthcare utilization and costs in years 1 and 2.
  
  
  RESULTS
  The revised definition identified 29% of the sample as having high-risk asthma, whereas the 2006 definition identified 67%. Compared with the 2006 definition, the revised definition identified patients with significantly greater asthma-related physical health problems and higher medical costs in year 1. In year 2, youths classified as high risk by the revised definition made more ED visits and were more likely to use oral steroids than those classified as high risk by the 2006 definition.
  
  
  CONCLUSIONS
  The revised high-risk asthma definition identifies half as many individuals and is better able to identify patients with poorly controlled asthma in the subsequent year.
authors.affiliation: Department of Health Services, University of Washington, Box 357660, Seattle, WA 98195-7660, USA. abenn@u.washington.edu
authors.forename: Antonia V
authors.initials: AV
authors.lastname: Bennett
authors.forename: Paula
authors.initials: P
authors.lastname: Lozano
authors.forename: Laura P
authors.initials: LP
authors.lastname: Richardson
authors.forename: Elizabeth
authors.initials: E
authors.lastname: McCauley
authors.forename: Wayne J
authors.initials: WJ
authors.lastname: Katon
mesh_terms: D000293:Adolescent; D018927:Anti-Asthmatic Agents / Q000627:therapeutic use; D001249:Asthma / Q000145:classification* / Q000175:diagnosis; D002648:Child; D003430:Cross-Sectional Studies; D017723:Drug Utilization Review; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data; D005260:Female; D006760:Hospitalization; D006801:Humans; D007345:Insurance Claim Review; D008297:Male; D012307:Risk Factors; D012720:Severity of Illness Index
chemical_list: D018927:Anti-Asthmatic Agents