Background
While validated scales must be created in order to systemically evaluate patients and quantify outcomes of aesthetic hand treatments, scales currently available are limited to analysis of volume loss alone.
Objectives
The purpose of this study was to develop three validated scales for the assessment of dorsal hand aging that also take into consideration wrinkling and pigmentation.
Methods
Fifty (50) healthy volunteers (40 females, 10 males) with Fitzpatrick skin types I-IV were recruited, and standard photographs of their left and right dorsal hands were taken with a Nikon D7100 (Nikon; Minato, Tokyo, Japan) camera. Using 25 randomized photographs, eleven Plastic Surgery physicians (three chief residents, six senior residents, and two aesthetic surgery fellows) were trained on the three scales under investigation, as well as the already-validated Merz Hand Grading Scale. The evaluators then viewed the remaining 75 photographs independently and assigned a grade for each of the four scales to each photograph. Interrater variability was calculated for each scale.
Results
The Kappa score for the Merz Hand Grading Scale was 0.25, indicating fair agreement, 0.40 for wrinkle scale, indicating fair agreement, and 0.48 and 0.46 for the pigmentation density and intensity scales, respectively, indicating moderate agreement (p<0.001).
Conclusions
The results show that after receiving training, the interrater agreement for the three scales under investigation was similar or slightly higher than that for the Merz Hand Grading Scale. These three photographic classification systems can be used consistently and reliably to characterize multiple signs of dorsal hand aging.