Characteristics and decreased Vitiligo Area Scoring Index of vitiligo patients with narrowband-UVB phototherapy in Yogyakarta, Indonesia.

Narrowband ultraviolet-B (NB-UVB) phototherapy is the mainstay of vitiligo therapy. The response can be evaluated using the vitiligo area scoring index (VASI) and repigmentation grade. However, few studies used VASI to evaluate phototherapy response and there are no definitive data on the reduction of VASI.