Table 1 EORTC QLQ-COMU26. Distribution of scale scores and individual items. Measurement properties
|  | Theoretical range | Observed range | Mean (SD) | Floor effect | Ceiling effect | Cronbach’s alpha | Test–retest reliability: ICC (p-value) | ICC 95% IC | p-value of change* |
|---|---|---|---|---|---|---|---|---|---|
0 – 100 | 0 – 100 | 0 – 100 | 0 – 100 | 0 – 100 | 0 – 100 |  |  |  | |
Scale 1 Patient’s active role-behaviours (items 1–3) | 0—100 | 0—100 | 80.2 (24.1) | 1.0% | 45.6% | 0.85 | 0.89 (< 0.001) | 0.862; 0.919 | 0.084 |
Scale 2 Aspects of the clinician-patient relationship (items 4–6) | 0—100 | 0—100 | 83.3 (22.5) | 0.8% | 51.9% | 0.87 | 0.86 (< 0.001) | 0.813; 0.892 | 0.006 |
Scale 3 Professional’s qualities in creating a relationship (items 7–11) | 0—100 | 0—100 | 88.1 (18.9) | 0.4% | 56.8% | 0.91 | 0.88 (< 0.001) | 0.846; 0.910 | 0.975 |
Scale 4 Professional’s skills (verbal-nonverbal language) (items 12–15) | 0—100 | 0—100 | 88.8 (17.2) | 0.2% | 57.2% | 0.87 | 0.88 (< 0.001) | 0.842; 0.907 | 0.175 |
Scale 5 Professional’s management of patient’s emotions (items 16–18) | 0—100 | 0—100 | 82.8 (25.1) | 1.6% | 54.4% | 0.89 | 0.92 (< 0.001) | 0.901; 0.942 | 0.895 |
Scale 6 Professional’s information-related skills (items 20, 21, 23, 24) | 0–100 | 0—100 | 77.9 (27.0) | 2.0% | 42.3% | 0.89 | 0.90 (< 0.001) | 0.869; 0.923 | 0.954 |
Professional’s taking into account patient’s preferences on how the information should be offered (item 19) | 0—100 | 0—100 | 75.5 (33.9) | 11.1% | 57.3% | ** | 0.86 (< 0.001) | 0.813; 0.890 | 0.392 |
Correcting misunderstandings in information when necessary (item 22) | 0—100 | 0—100 | 82.4 (28.0) | 4.8% | 65.1% | ** | 0.91 (< 0.001) | 0.873; 0.932 | 0.151 |
Enough privacy (item 25) | 0 – 100 | 0 – 100 | 81.9 (29.5) | 6.5% | 66.0% | ** | 0.88 (< 0.001) | 0.844; 0.908 | 0.441 |
Satisfaction with the communication (item 26) | 0–100 | 0–100 | 86.0 (24.0) | 2.4% | 69.4% | ** | 0.91 (< 0.001) | 0.881; 0.930 | 0.955 |