Item response theory was used to shorten EORTC QLQ-C30 scales for use in palliative care.
Petersen MA, Groenvold M, Aaronson N, Blazeby J, Brandberg Y, de Graeff A, Fayers P, Hammerlid E, Sprangers M, Velikova G, Bjorner JB; European Organisation for Research and Treatment of Cancer Quality of Life Group.
Petersen MA, et al. Among authors: groenvold m.
J Clin Epidemiol. 2006 Jan;59(1):36-44. doi: 10.1016/j.jclinepi.2005.04.010. Epub 2005 Sep 12.
J Clin Epidemiol. 2006.
PMID: 16360559