Quality of Life Questionnaire (EORTC QLQ-C30; Physicians' Global Assessment score). The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30), a 30-item instrument, assesses health-related quality of life in cancer patients. The scale assesses 15 domains: 5 functional scales, 3 symptom scales, 6 single-item measures, and 1 global quality of life scale. Compared to baseline, a score change of ≥10 points in functional scales or the global quality of life scale indicates clinical significance (higher scores represent better functioning or quality of life). For symptom scales/single-item measures, a score increase ≥10 points signifies deterioration (higher scores indicate more severe symptoms or problems). An improvement is defined as either a ≥10-point increase in functional scale scores or a ≥10-point decrease in symptom scale scores.