Item response theory and its applications to patient-reported outcomes measurement

Eval Health Prof. 2005 Sep;28(3):264-82. doi: 10.1177/0163278705278275.


This article provides an overview of item response theory (IRT) models and how they can be appropriately applied to patient-reported outcomes (PROs) measurement. Specifically, the following topics are discussed: (a) basics of IRT, (b) types of IRT models, (c) how IRT models have been applied to date, and (d) new directions in applying IRT to PRO measurements.

Publication types

  • Review

MeSH terms

  • Health Services Research / methods*
  • Humans
  • Mathematical Computing
  • Models, Statistical
  • Outcome Assessment, Health Care / methods*