Scale (No. of items) | Internal consistency Cronbach’s alpha | IIC | Scaling assumptions-corrected ITC | Test retest reproducibility | Convergent validity | Discriminant validity | ||||
---|---|---|---|---|---|---|---|---|---|---|
ICC consistency | ICC absolute | Correlation | Related SF12 scale r 1 | PU-QOL HRQL item r 1(n) | Gender R 2(n) | Age r 2(n) | ||||
Pain (8) | 0.89 | 0.24 – 0.66^ | 0.53 – 0.70^ | 0.80 | 0.81 | 0.80 | 0.48b | 0.38b (206) | 0.13b (214) | 0.11b (214) |
Exudate (8) | 0.91 | 0.32 – 0.72^ | 0.51 – 0.75^ | 0.62 | 0.63 | 0.62 | n/a | 0.25a (216) | 0.08b (225) | -0.14b (224) |
Odour (6) | 0.97 | 0.72 – 0.93^ | 0.79 – 0.94^ | 0.68 | 0.68 | 0.70 | n/a | 0.20a (217) | 0.05b (228) | -0.14b (227) |
Sleep (6) | 0.92 | 0.49 – 0.81^ | 0.68 – 0.85^ | 0.82 | 0.82 | 0.82 | n/a | 0.32b (171) | 0.21b (178) | 0.10b (178) |
Vitality (6) | 0.90 | 0.49 – 0.90^ | 0.63 – 0.90^ | 0.74 | 0.74 | 0.74 | 0.36b | 0.52b (135) | 0.03b (137) | -0.16b (137) |
Movement/Mobility (9) | 0.93 | 0.23 – 0.91^ | 0.67 – 0.80^ | 0.87 | 0.86 | 0.88 | -0.50b | 0.39b (37) | 0.04b (39) | 0.22b (39) |
ADL (8) | 0.95 | 0.41 – 0.90^ | 0.58 – 0.90^ | 0.87 | 0.87 | 0.87 | -0.38b | 0.35b (48) | -0.05b (49) | -0.19b (49) |
Emotional well-being (15) | 0.94 | 0.24 – 0.79^ | 0.54 – 0.76^ | 0.83 | 0.82 | 0.83 | -0.44b | 0.58b (133) | 0.16b (135) | -0.15b (135) |
Appearance & self-consciousness (7) | 0.89 | 0.37 – 0.79^ | 0.62 – 0.76^ | 0.81 | 0.81 | 0.81 | -0.40b | 0.50b (176) | 0.23b (179) | -0.03b (178) |
Participation (9) | 0.93 | 0.36 – 0.88^ | 0.60 – 0.86^ | 0.63 | 0.64 | 0.63 | -0.52b | 0.51b (75) | 0.01b (76) | -0.29b (76) |