European organization for research and treatment of cancer core quality of life questionnaire [EORTC QLQ-C30].
cancer
CANCER
The 30-item EORTC QLQ-C30 was designed to measure the self-rated QoL in cancer patients. It is widely used in clinical studies in the oncological research field. It provides a global QoL score, 5 functional scales, with higher scores indicating a better level of functioning, as well as 9 symptom scales, for which higher scores correspond to a higher level of symptoms. Two items rate the global QoL score and are answered on a 7-point Likert scale from 1 (“very poor”) to 7 (“excellent”). The rest of the items are scored from 1 (“not at all”) to 4 (“very much”).