International validation of the EORTC CAT Core: a new adaptive instrument for measuring core quality of life domains in cancer.
Morten Aagaard PetersenNeil K AaronsonThierry ConroyAnna CostantiniJohannes M GiesingerEva HammerlidBernhard HolznerColin D JohnsonJacobien M KiefferMarieke van LeeuwenSandra NolteJohn K RamageKrzysztof A TomaszewskiAnnika WaldmannTeresa YoungPaola ZottiMogens Groenvoldnull nullPublished in: Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation (2020)
The EORTC CAT Core measures the same domains as the QLQ-C30 with reduced floor/ceiling effects. The CAT generally facilitated the use of smaller samples (about 30% smaller on average) without loss of power compared to the QLQ-C30. Based on this study, the EORTC QLG will release the EORTC CAT Core for general use.