Table 1. Construct Validity of the T-VASI and F-VASI.
| Outcome measure | T-VASI | F-VASI | ||||||
|---|---|---|---|---|---|---|---|---|
| Baseline | Week 24 | Baseline | Week 24 | |||||
| Spearman correlation | P value | Spearman correlation | P value | Spearman correlation | P value | Spearman correlation | P value | |
| PhGVA-T | 0.63 | <.001 | 0.65 | <.001 | 0.20 | .01 | 0.38 | <.001 |
| PhGVA-F | 0.22 | <.01 | 0.35 | <.001 | 0.65 | <.001 | 0.71 | <.001 |
| PaGVA-T | 0.61 | <.001 | 0.53 | <.001 | 0.11 | .16 | −0.01 | .10 |
| PaGVA-F | 0.25 | .001 | 0.21 | <.01 | 0.55 | <.001 | 0.28 | <.001 |
| VitiQoL | 0.16 | .04 | 0.12 | .12 | 0.05 | .53 | 0.06 | .47 |
| DLQI | 0.20 | .01 | 0.15 | .07 | 0.02 | .80 | 0.15 | .06 |
| HADS-anxiety | 0.06 | .45 | −0.08 | .35 | −0.05 | .57 | −0.12 | .12 |
| HADS-depression | 0.14 | .07 | 0.06 | .48 | < −0.001 | .96 | <0.01 | .97 |
| VNS | NA | NA | −0.24 | <.01 | NA | NA | −0.15 | .07 |
Abbreviations: DLQI, Dermatology Life Quality Index; PaGVA-F, Face Patient Global Vitiligo Assessment; PhGVA-F, Face Physician Global Vitiligo Assessment; F-VASI, Facial Vitiligo Area Scoring Index; HADS, Hospital Anxiety and Depression Scale; NA, not applicable; PaGVA-T, Total Patient Global Vitiligo Assessment; PhGVA-T, Total Physician Global Vitiligo Assessment; T-VASI, Total-Vitiligo Area Scoring Index; VitiQoL, Vitiligo Quality-of-Life Instrument; VNS, Vitiligo Noticeability Scale.