Thresholds for clinical importance were established to improve interpretation of the EORTC QLQ-C30 in clinical practice and research

This is the authors' abstract. We don't add key points for this paper.

This EORTC Quality of Life Group study provides TCIs for the functioning and symptom scales of the EORTC QLQ-C30. These TCIs can increase the interpretability of the questionnaire results and foster its use in daily clinical practice and in clinical research.