As research into patient quality of life has become increasingly important, the QLG is keen that high quality information regarding its assessment and use in clinical trials be available.

Questionnaire developed to assess the quality of life of cancer patients. It has been translated and validated into over 100 languages and is used in each year in more than 5,000 studies worldwide.

A computerised adaptive testing (CAT) version of the EORTC QLQ-C30 has been developed by the EORTC QLG to maximise the information obtained through questionnaire administration by adapting the questionnaire to the individual respondent.

This questionnaire is a validated health utility instrument which enables calculation of utility scores from the parent HRQOL instrument, EORTC QLQ-C30, based on 10 of the 15 dimensions covered by the QLQ-C30.