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

The first study will aim to identify the incidence and prevalence of alopecia areata in the dermatology clinic of a metropolitan teaching hospital between 1/1/2011 and 31/12/2020 The second study will assess (1) the epidemiology of autoimmune and atopic diseases in patients with alopecia areata, (2) the presence of possible risk factors responsible for the onset/relapse/exacerbation of alopecia areata, (3) the levels of vitamin D and various autoantibodies,particularly thyroid autoantibodies and (4) the variety, duration, efficacy and safety profile of treatment modalities used in our hospital for the management of alopecia areata from 15/10/2021 to 14/10/2022. The third study will monitor the monthly oscillations of vitamin D and thyroid-autoantibodies of patients with new-onset/relasping or exacerbating alopecia areata for six months, between 15/10/2021-14/10/2022 in order to observe if changes in levels of vitamin D and thyroid-antiantibodies are associated with severity and prognosis (worsening or improvement) of alopecia areata