The PedsQL

Reliability and Validity of the Short-Form Generic Core Scales and Asthma Module

Published in: Medical Care, v. 43, no. 3, Mar. 2005, p. 256-265

Posted on RAND.org on December 31, 2004

by Kitty S. Chan, Rita Mangione-Smith, Tasha M. Burwinkle, Mayde Rosen, James W. Varni

Read More

Access further information on this document at www.lww-medicalcare.com

This article was published outside of RAND. The full text of the article can be found at the link above.

OBJECTIVE: The authors sought to assess the reliability and validity of the PedsQLTM 4.0 SF15, a shortened version of the 23-item PedsQLTM 4.0 Generic Core Scales, which is a pediatric health-related quality of life (HRQoL) instrument, and the PedsQLtrade mark 3.0 SF22 Asthma Module, a short-form of the PedsQLTM 3.0 Asthma Module. METHODS: The PedsQLTM 4.0 SF15 and the PedsQLTM 3.0 SF22 Asthma Module were administered by telephone to 125 adolescents (aged 12-18) and 338 parents of children with asthma (aged 2-11). Healthy (n = 451) and chronically ill (n = 422) children, matched by age, respondent status, and ethnicity to the asthma sample, provided data for selected validity tests. RESULTS: The Total Score from the PedsQLTM 4.0 SF15 and the Asthma Symptoms scale and Treatment Problems scale from the PedsQLTM 3.0 SF22 Asthma Module were sufficiently reliable for group comparisons (alpha >/= 0.70 across all age groups) in the asthma sample. The PedsQLTM mark 4.0 SF15 and the PedsQLTM 3.0 SF22 Asthma Module were able to distinguish between children of different clinical status and correlated as expected with measures of productivity and family functioning in the asthma sample. The psychometric properties of the PedsQLTM 4.0 SF15 were generally comparable to those of the original instrument. CONCLUSION: The Total Score of the PedsQLTM 4.0 SF15 and the Asthma Symptoms scale of the PedsQLTM 3.0 SF22 Asthma Module demonstrated the best reliability and validity and should be suitable for group-level comparisons of generic and asthma-specific HRQoL in clinical research studies of children with asthma.

This report is part of the RAND Corporation External publication series. Many RAND studies are published in peer-reviewed scholarly journals, as chapters in commercial books, or as documents published by other organizations.

Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/principles.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.