Table 2 Descriptive statistics of the EQ-5D index and the EORTC QLQ-C30 scales used in the derivation and validation sets
From: Mapping EORTC QLQ-C30 onto EQ-5D for the assessment of cancer patients
Variables | Derivation set | Validation set (n = 123) | |||
|---|---|---|---|---|---|
n | Mean (SD) | Median (IQR) | Mean (SD) | Median (IQR) | |
EQ-5D index | 893 | 0.824 (0.137) | 0.854 (0.723–0.907) | 0.871 (0.113) | 0.87 (0.817–1.000) |
EORTC QLQ-C30 functional scales | Â | Â | Â | ||
 Global health status* | 893 | 59.8 (21.9) | 66.7 (25.0–50.0) | 68.2 (22.5) | 66.7 (50.0–83.3) |
 Physical functioning* | 893 | 72.1 (18.3) | 73.3 (60.0–86.7) | 79.2 (16.0) | 80.0 (73.3–93.3) |
 Role functioning* | 893 | 68.2 (27.1) | 66.7 (50.0–100) | 77.2 (21.9) | 83.3 (66.7–100) |
 Emotional functioning* | 893 | 70.9 (23.2) | 75.0 (58.3–91.7) | 79.8 (21.1) | 83.3 (66.7–100) |
 Cognitive functioning* | 892 | 76.5 (20.8) | 83.3 (66.7–100) | 80.5 (19.4) | 83.3 (66.7–100) |
 Social functioning* | 893 | 62.8 (28.2) | 66.7 (50.0–83.3) | 73.2 (23.0) | 66.7 (66.7–100) |
EORTC QLQ-C30 symptom scales/items | Â | Â | Â | ||
 Fatigue* | 893 | 40.6 (22.0) | 33.3 (22.2–55.6) | 33.0 (19.8) | 33.3 (22.0–44.4) |
 Nausea and vomiting* | 893 | 22.5 (25.5) | 16.7 (0.0–33.3) | 14.9 (21.8) | 0.0 (0.0–16.7) |
 Pain* | 893 | 28.8 (26.2) | 16.7 (0.0–50.0) | 17.1 (21.2) | 16.7 (0.0–33.3) |
 Dyspnea* | 892 | 24.4 (26.8) | 33.3 (0.0–33.3) | 17.9 (21.9) | 0.0 (0.0–33.3) |
 Insomnia* | 889 | 31.3 (30.6) | 33.3 (0.0–33.3) | 19.5 (23.7) | 0.0 (0.0–33.3) |
 Appetite loss* | 889 | 31.8 (31.4) | 33.3 (0.0–66.7) | 18.4 (24.2) | 0.0 (0.0–33.3) |
 Constipation | 892 | 26.1 (29.3) | 33.3 (0.0–33.3) | 20.9 (26.8) | 0.0 (0.0–33.3) |
 Diarrhea* | 892 | 18.7 (26.0) | 0.0 (0.0–33.3) | 27.4 (28.6) | 33.3 (0.0–33.3) |
 Financial difficulties | 892 | 37.9 (33.3) | 33.3 (0.0–66.7) | 31.7 (30.1) | 33.3 (0.0–66.7) |