Study on Hair Diameter in Patients with Hair Loss before and after Treatment and the Hair Diameter of their Immediate Family

Hair diameter could be used as main factor in evaluating hair mass, as hair diameter is known as a more accurate factor in hair counting for evaluating hair mass. According to age, gender, skin type, hair loss type and hair growth after treatment, hairs diameter are different. The study of hair diameter in Patients with hair loss referring to the department of dermatology before and after treatment and the hair diameter of their immediate family and comparing it with control group. Between 2009-2010, 240 patients who were visited in our department of dermatology because of hair loss and control group without hair loss were studied. Hair samples from different areas of their scalp were taken by hair Pull method and its diameter was measured with digital micrometer with 1 micrometer accuracy. Then findings were evaluated. There were not significant differences in age between different groups. Hair diameter had increased after treatment (P=0.027) and was higher in women than men (P=0.01), and in bright brown hair than dark brown (P=0.04). Hair diameter after treatment in each gender was increased {men (P<0.001) and women (P=0.027)} which this increase was higher in men than women (P<0.001). Mean hair diameter in frontal area was lower than other regions (P=0.03). In this study we observed that hair diameter was different according to gender hair color and type of hair lost. The hair diameter is increased after treatment (P=0.027) and it is higher in women than men (P=0.01) and in bright brown hairs than dark browns (P=0.04).