4.3. Eczema Area and Severity Index (EASI) Score and Severity of Alopecia Tool (SALT) Score

EASI score was measured as reported previously [48,49]. The degree of hair loss based on the percentage of the affected scalp surface area was assessed by SALT score [50]. The scalp was divided into four parts according to the surface area as follows: the vertex or top = 40% (0.40), right side = 18% (0.18), left side = 18% (0.18), and the posterior aspect = 24% (0.24). The percentage of hair loss in any of the four areas was multiplied by the percentage of the scalp covered in that area. The SALT score is the sum of the percentages of hair loss in all of the areas [SALT score = (percentage of hair loss at the vertex × 0.4) + (percentage of hair loss at the right side × 0.18) + (percentage of hair loss at the left side × 0.18) + (percentage of hair loss at the posterior aspect × 0.24)].