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Abstract
Aim: Vitamin D is an important factor for the hair follicle cycle. Alopecia areata (AA), androgenetic alopecia (AGA), and telogen effluvium (TE) are the most common forms of non-scarring alopecia. This study aimed to define vitamin D levels and hemogram parameters in children and adolescents with non-cicatricial alopecia. Material and Methods: A total of 157 patients under the age of 18 and diagnosed with AA, AGA, and TE were included in this retrospective study. Vitamin D levels, and neutrophil/lymphocyte (neu/lym) and platelet/lymphocyte (plt/lym) ratios were evaluated. Vitamin D levels were examined in four different groups according to the admission period as autumn, winter, spring, and summer. Results: Of the patients, 30 were diagnosed with AA, 11 with AGA, and 116 with TE. Vitamin D deficiency was detected in 128 of 153 patients, of whom vitamin D levels were examined, insufficiency in 20, and sufficiency in 5. There was no statistically significant difference in vitamin D levels between groups (p=0.114). Also, no statistically significant difference was found between the groups in terms of vitamin D deficiency and insufficiency (p=0.403). Vitamin D levels were significantly higher in males than in females (p
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