Table 7: Average difference between vitiligo and healthy skin.

Parameter Relative difference STD

Melanin 0.27 0.026
Epidermis thickness 0.95 0.043
Haemoglobin concentration 1.05 0.109
Oxygenated haemoglobin 1.07 0.030
Dermis thickness 1.06 0.062

STD: standard deviation.