Table 4 Internal consistency (Cronbach alpha) for WHOQOL-BREF, SKINDEX-16, HRQ-Melasma domains
Instrument | Cronbach's alpha | Number of items |
|---|---|---|
WHOQOL-BREF | ||
Physical | 0.85 | 7 |
Psychological | 0.87 | 6 |
Personal relations | 0.80 | 3 |
Environment | 0.80 | 8 |
SKINDEX-16 | ||
Physical | 0.79 | 4 |
Emotional | 0.93 | 7 |
Functional | 0.93 | 5 |
HRQ-Melasma | ||
Physical/Appearance | 0.86 | 3 |
Social/Professional | 0.92 | 5 |
Psychological | 0.95 | 8 |
Treatment | 0.81 | 3 |