From: Validation of the osteoporosis quality of life questionnaire QUALEFFO-41 for the Serbian population
Questionnaire/domain | Cronbach's α (range of Cronbach's α if item deleted) | Range of item correlation coefficient with own domain (%)a | Range of item correlation coefficient with other domains (%)a | Intraclass correlation coefficient (n = 38) | ||||
---|---|---|---|---|---|---|---|---|
Controls | Cases | Controls | Cases | Controls | Cases | Controls | Cases | |
QUALEFFO-41 | Â | Â | Â | Â | Â | Â | Â | Â |
Pain | 0.82 (0.73-0.87) | 0.86 (0.81-0.86) | 0.21-0.92 (80.00) | 0.69-0.88 (100.00) | -0.21-0.47 (20.00) | 0.15-0.55 (60.00) | 0.78 (0.53-0.90) | 0.87 (0.76-0.87) |
Physical function | 0.92 (0.91-0.93) | 0.93 (0.92-0.94) | 0.33-0.84 (94.12) | 0.32-0.86 (94.11) | 0.03-0.69 (45.59) | 0.01-0.66 (76.47) | 0.83 (0.62 - 0.92) | 0.94 (0.88-0.97) |
Social function | 0.33 (0.08-0.51) | 0.80 (0.75-0.80) | 0.03-0.71 (57.14) | 0.46-0.81 (100.00) | -0.29-0.60 (17.86) | -0.10-0.74 (50.00) | 0.78 (0.52 - 0.90) | 0.91 (0.82-0.95) |
General health perception | 0.48 (0.12-0.72) | 0.81 (0.62-0.89) | 0.45-0.83 (100.00) | 0.77-0.91 (100.00) | -0.01-0.45 (25.00) | 0.38-0.73 (91.67) | 0.15 (-0.59 - 0.55) | 0.91 (0.84-0.95) |
Mental function | 0.74 (0.66-0.75) | 0.79 (0.74-0.79) | 0.39-0.79 (55.56) | 0.37-0.81 (66.67) | -0.01-0.62 (27.78) | 0.01-0.65 (30.56) | 0.76 (0.47 - 0.89) | 0.89 (0.80-0.94) |
Total QUALEFFO-41 score | 0.91 (0.90-0.92) | 0.83 (0.75-0.89) | Â | Â | Â | Â | 0.82 (0.60 - 0.92) | 0.96 (0.92 - 0.98) |
EQ-5D | Â | Â | Â | Â | Â | Â | Â | Â |
Health state value | 0.75 (0.73-0.88) | 0.84 (0.83-0.89) | -0.77- -0.56 (100.00) | -0.82- -0.66 (100.00) | Â | Â | Â | Â |