Table 3.
Reliability of the quality of life instrument QLICD-CHD (n = 146 for α, n = 50 for r and ICC)
| Domains/Facets | Internal consistency coefficient α | Test-retest reliability correlation coefficient r | Test-retest reliability ICC (95% CI ) |
|---|---|---|---|
|
Physical domain (PHD) |
0.76 |
0.95 |
0.95 (0.91-0.97) |
| Independence |
0.70 |
0.98 |
0.98 (0.97-0.99) |
| Appetite and sleep |
0.46 |
0.77 |
0.77 (0.62-0.86) |
| Physical Symptoms |
0.67 |
0.97 |
0.98 (0.96-0.99) |
|
Psychological domain (PSD) |
0.90 |
0.92 |
0.92 (0.86-0.95) |
| Cognition |
0.73 |
0.92 |
0.92 (0.87-0.96) |
| Anxiety |
0.81 |
0.85 |
0.84 (0.74-0.91) |
| Depression |
0.84 |
0.93 |
0.93 (0.88-0.96) |
| Self-consciousness |
0.76 |
0.91 |
0.91 (0.84-0.95) |
|
Social domain (SOD) |
0.63 |
0.86 |
0.85 (0.75-0.91) |
| Social Support/Security |
0.74 |
0.84 |
0.83 (0.71-0.90) |
| Social Effects |
0.75 |
0.92 |
0.91 (0.85-0.95) |
| Sexual function |
- |
0.94 |
0.96 (0.94-0.98) |
|
Sub-total (QLICD-GM) |
- |
0.92 |
0.92 (0.86-0.95) |
|
Specific domain (SPD) |
0.79 |
0.80 |
0.80 (0.68-0.88) |
| Symptom |
0.78 |
0.70 |
0.72 (0.54-0.73) |
| Effect of medicine |
- |
0.61 |
0.61 (0.40-0.76) |
| Effect on mental health and daily life |
0.65 |
0.89 |
0.92 (0.86-0.95) |
| Total (TOT) | - | 0.90 | 0.91 (0.84-0.95) |
- not acceptable/suitable, ICC: intra-class correlation, CI: confidence interval.