The Epidemiology, Management and Comorbidities in Alopecia Areata in Czech Republic

Inclusion Criteria: * All patients visiting our clinic with a dermatologic condition between 1/1/2011-31/12/2020 * For the second study, only patients with histologic/dermatoscopic diagnosis of new-onset/relapsing/peristent-untreated alopecia areata, presenting to our clinic between 15/10/2021-14/10/2022 are included. Exclusion Criteria: * For the second study patients with other alopecias, patients denying data sharing despite signing the informed concent and presenting outside the study period are excluded. * For the third study, patients with other types of alopecia, as well as those who signed the informed consent but refused to share their data or undergo blood tests at our hospital, and those who did not visit our outpatient department at least once a month for the required duration, were excluded.