The Vitiligo Noticeability Scale (VNS) asks patients to rate how noticeable their vitiligo is after treatment.
In this validity study, patients and clinicians examined image pairs depicting simulated vitiligo pre- and post-treatment. They rated them for ‘noticeability’ and treatment success, and clinicians also estimated percentage repigmentation of lesions. Agreement between the responses was then assessed.
VNS scores were associated with both patient- and clinician-reported treatment success (kappa = 0.54 and 0.47, respectively), while percentage repigmentation showed a weaker correlation (k = 0.39 and 0.29, respectively).
The researchers conclude that the VNS is a more consistent indicator of treatment success than percentage repigmentation, and VNS scores of four or five (out of five) represent success.
This study focused on ‘high-expression’ sites (face and hands), but the researchers suggest that further large studies could assess the VNS on a wider range of anatomical sites.
Batchelor JM, Tan W, Tour S et al. Br J Dermatol 2016; 174: 386-94