Hair Density Of Healthy Adults In Guangdong And The Relationship With TCM Constitution

ObjectiveTo evaluate hair density of healthy adults in Guangdong Province and explore the relationship between hair density and TCM constitution.Methods76volunteers are enrolled in the study. Four areas were shaved on each part of the scalp, including the vertex, temporal (both left and right) and occipital areas, and photos of the shaved scalp were taken by a digital camera through a handheld dermatoscope. The density of hairs and follicular units and some other parameters were obtained by photographic analysis. Besides, volunteers were grouped by age and TCM constitution to explore the relationship among them.ResultsAn average (68±8) FUs/cm2and (139±19) hairs/cm2were calculated in healthy adults of Guangdong. Hairs were different in distribution on scalp where high density was found in vertex and occipital areas than in temporal areas(P=0.000), while no difference of hair density was found between man and women (P>0.05). Hair density decreased as the age increasing.2-hair FUs were the predominate group (49.08%). The proportions of the different hair groupings differed in different groups of ages, which the proportion of1-hair FUs (33.29%) in50-60s were more than other groups while the3-hair FUs (16.67%) were less. Volunteers were grouped by different TCM constitutions but no correlation was found between hair density and TCM Constitution.Conelusion1. Hair density differs in different areas of scalp in76healthy adults of Guangdong, and it changes with age.2. Two-hair FUs are the predominate group. The proportions of the different hair groupings change according to age.3. No correlation was found between hair density and TCM constitution.