Abstract
Purpose
Assessing health-related quality of life (HRQoL) via Computerized Adaptive Tests (CAT) provides greater measurement precision coupled with a lower test burden compared to conventional tests. Currently, there are no European pediatric HRQoL CATs available. This manuscript aims at describing the development of a HRQoL CAT for children and adolescents: the Kids-CAT, which was developed based on the established KIDSCREEN-27 HRQoL domain structure.
Methods
The Kids-CAT was developed combining classical test theory and item response theory methods and using large archival data of European KIDSCREEN norm studies (n = 10,577–19,580). Methods were applied in line with the US PROMIS project. Item bank development included the investigation of unidimensionality, local independence, exploration of Differential Item Functioning (DIF), evaluation of Item Response Curves (IRCs), estimation and norming of item parameters as well as first CAT simulations.
Results
The Kids-CAT was successfully built covering five item banks (with 26–46 items each) to measure physical well-being, psychological well-being, parent relations, social support and peers, and school well-being. The Kids-CAT item banks proved excellent psychometric properties: high content validity, unidimensionality, local independence, low DIF, and model conform IRCs. In CAT simulations, seven items were needed to achieve a measurement precision between .8 and .9 (reliability). It has a child-friendly design, is easy accessible online and gives immediate feedback reports of scores.
Conclusions
The Kids-CAT has the potential to advance pediatric HRQoL measurement by making it less burdensome and enhancing the patient–doctor communication.
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Acknowledgments
This work was funded by the German Federal Ministry of Education and Research (BMBF, Grant 0010-01GY1111, PI: Prof. Dr. Ulrike Ravens-Sieberer, MPH, University Medical Center Hamburg-Eppendorf). We would like to thank our advisory board members (Prof. Dr. Christopher Forrest, Prof. Dr. Lena Lämmle, Prof. Dr. Markus Wirtz, and Prof. Dr. Monika Bullinger) for the helpful advice and support. We also thank all children and parents, who participated in the archived studies, which were used for building the Kids-CAT.
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Devine, J., Otto, C., Rose, M. et al. A new computerized adaptive test advancing the measurement of health-related quality of life (HRQoL) in children: the Kids-CAT. Qual Life Res 24, 871–884 (2015). https://doi.org/10.1007/s11136-014-0812-7
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DOI: https://doi.org/10.1007/s11136-014-0812-7