Retrospective Evaluation of Clinical Profile and Comorbidities in Patients with Alopecia Areata

OBJECTIVE: The aim of the study was to determine the clinical profile of the patients with alopecia areata (AA) and whether or not any differences between the AA patients with and without comorbidity. METHODS: A total of 218 patients diagnosed with AA between January 1, 2016, and August 31, 2020, in our outpatient clinic were analyzed retrospectively. RESULTS: The mean age was 27.8[+ or -]12.3. 61.5% of the patients were male (M/F=1.59). There were AA in 96.3%, alopecia universalis in 3.2%, and alopecia totalis in 0.5% of the patients. Most of them showed unifocal involvement (85.8%) and multifocal involvement to a smaller extent (10.5%). Number of patches was 1 in 75.2%, 2 in 16.7% and 3 or more in 8.1% of AA patients. Average disease duration was 18.1 months. Comorbid diseases were accompanying to 51.8% of the patients. Dermatological diseases were among the most common accompanying diseases (17.9%). However, hypothyroidism (12.8%) was the most frequent comorbid disease. There were thyroidal diseases in 15.1%, allergic disorders in 7.7%, psychiatric disorders in 7.3%, anemia in 5.9%, rheumatic diseases in 2.2%, other endocrine diseases in 1.8%, malignancy in 1.3%, and morbid obesity in 1.3% of the patients. Down syndrome accompanied in 0.9%. Vitamin-D deficiency (38.9%), low ferritin (13.8%), and B12 deficiency (9.6%) were also detected. Female gender (46.9 to 29.5%, p=0.008), extensive disease (p=0.085), Vitamin B12 deficiency (13.3 to 5.7%, p=0.059), and low ferritin level (20.4 to 6.7%, p=0.003) were observed more in patients with comorbidity than those without one. CONCLUSION: AA accompanies various systemic, autoimmune, and psychiatric diseases. Dermatologists need to recognize potential comorbid diseases, evaluate and manage these patients with a multidisciplinary approach to achieve a better outcome. Keywords: Alopecia areata; B12; comorbidity; ferritin; hypothyroidism; vitamin D.