Table 2 Internal consistency and score distribution of the WHOQOL-BREF (TW) in IDU (n = 510)
Domain and facet | α | Floor effect (%) | Ceiling effect (%) |
|---|---|---|---|
Overall quality of life | 2.7 | 3.3 | |
General health | 4.1 | 2.0 | |
Physical health domain | 0.79 | 0.0 | 0.2 |
Pain and discomfort | 2.7 | 13.5 | |
Dependence on medication or treatment | 2.9 | 24.5 | |
Energy and fatigue | 4.9 | 4.7 | |
Mobility | 4.3 | 9.4 | |
Sleep and rest | 7.5 | 3.5 | |
Activities of daily living | 1.8 | 3.5 | |
Working capacity | 3.1 | 5.1 | |
Psychological health domain | 0.78 | 0.0 | 0.0 |
Positive feelings | 20.0 | 1.2 | |
Spirituality, religion and personal beliefs | 12.9 | 6.5 | |
Thinking, learning, memory and concentration | 6.7 | 4.3 | |
Body image and appearance | 3.7 | 12.5 | |
Self-satisfaction | 4.3 | 6.9 | |
Negative feelings | 6.5 | 3.9 | |
Social relationships domain | 0.76 | 0.8 | 1.0 |
Personal relationships | 1.8 | 4.7 | |
Sexual activity | 5.9 | 4.1 | |
Friend’s support | 2.2 | 4.1 | |
Respecta | 6.3 | 2.7 | |
Environment domain | 0.87 | 0.0 | 0.2 |
Physical safety and security | 9.0 | 2.9 | |
Physical environments | 8.0 | 4.3 | |
Financial resources | 21.2 | 3.5 | |
Opportunities for new information and skills | 5.7 | 3.5 | |
Participation and support of leisure activities | 6.1 | 3.3 | |
Home environment | 1.6 | 7.5 | |
Heath and social care: availability and quality | 1.4 | 5.1 | |
Transportation | 2.0 | 4.5 | |
Eatinga | 1.0 | 14.3 |