Fig. 2. The correlation between patient and observer scar assessment scale (POSAS) to objective scar assessment tool. (A) a^* indicated color values from green to red and it was applied to scar vascularity. The correlation between POSAS and spectrometer was significant but moderate relationship. (B, C) L^* expressed brightness and it was used for the evaluation of scar pigmentation. b^* designated values from blue to yellow and it was used for the measurement of scar pigmentation along with L^*. The degree of correlation about pigmentation showed insignificant results between two different scar evaluation tool. (D) The correlation between POSAS and objective assessment using ultrasonography showed low relationship.