fig6

Figure 6. Computer simulation of patterns based on scalp coverage scoring (SCS) in patients complaining of hair loss. Figure 6 (left of vertical double bar) shows fields known as top and vertex, frontal and lateral or midline-parted (groups of numbered squares as detailed in earlier section). The sum of SCS in each field mathematically documents coverage and is tested statistically by comparing the SCS in a clinical group vs. a theoretical maximum score. If a field contains nine squares, then 9 × 5, i.e., 45, is the maximum attainable score (100%) while the parted-midline maximum is 4 × 5 = 20 (100%). Intermediate sum of scores would translate relatively speaking into grey shades in this artistic representation. As detailed in Tables 7 and 8 (SCS relative per cent of maximum), there were statistically significant differences in SCS values between patients in these fields. For a clinical correlation, we typically refer the reader to Figure 1 where sum SCS 100% would easily be reached in the top-vertex or lateral-crown fields by the two subjects appearing on the left [Figure 1E; HI]. On the contrary, the 2 probands appearing on the right would be closer to 10%-20% (HIV and HV) with “no difficulty observing scalp skin through the hair”. For females, we refer to clinical images shown in Figure 2. The images in the two top rows clearly illustrate that scalp skin is less easily visible in NoP, LI or Other [analogous to Figure 6A] than in LII [analogous to Figure 6B] or LIII [analogous to Figure 6C]. Of note is that the crown becomes involved in Figure 6C, i.e., in the most severely affected subjects. Comparing density in each paired left and right diagrams in these three panels [Figure 6A-C], it is clear that midline parting displays lighter grey levels. Lower SCS scores mean that combing the hair apart unravels a decreased coverage on the top-vertex on the crown, especially in the most severe cases [Figure 6B and C].