Setting reference values in trichology
| Autor: | Alfredo Rebora, Maria Caterina Fortuna, Michela Starace, Francesco Drago, Paolo Chieco, Roberto D'Ovidio, Bianca Maria Piraccini, Alfredo De Rossi, Marcella Guarrera |
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| Přispěvatelé: | Rebora, Alfredo, Guarrera, Marcella, Drago, Francesco, Rossi, Alfredo, Fortuna, Maria Caterina, D'Ovidio, Roberto, Chieco, Paolo, Piraccini, Bianca Maria, Starace, Michela |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Male
Pathology medicine.medical_specialty Dermatology Normal values Sampling Studies White People 030207 dermatology & venereal diseases 03 medical and health sciences 0302 clinical medicine Reference Values medicine Humans Child Scalp business.industry Hair diameter hair density children tricoscopy Occiput Alopecia Hair follicle medicine.anatomical_structure 030220 oncology & carcinogenesis Reference values Child Preschool Hair shedding Female business Nuclear medicine Hair Follicle Hair |
| Popis: | Background In clinical trichology, reference values are often arbitrary. The difficulty in setting them up depends mostly on the presence of the androgenetic alopecia (AGA) genotype in subjects with clinically unapparent forms. Prepubertal children, who lack 5α-reductase (a real indicator of the AGA phenotype), might provide reference values independent from AGA. We verified whether the vertex/occiput ratios (V/O) of hair density and the V/O of hair diameter are suitable parameters. Methods In sixty 4–10-year-old Caucasian children, we measured the ratio between the hair density at the vertex and the occiput. The same was done for the diameter. Results The V/O of density averaged 1.07 ± 0.17 and the V/O of diameter 1.02 ± 0.11. Conclusions Taking the mean ± 2SD as normal values, our “normal” V/O of density ranged between 0.73 and 1.41 and our “normal” V/0 of diameter between 0.8 and 1.24. People with lower ratios would have, therefore, AGA with 95% of probability. Moreover, we found that hair shedding using the hair pull test and the modified wash test come to 1-2 hairs/day. |
| Databáze: | OpenAIRE |
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