Letter to the editor regarding ‘Evaluation of vitamin D levels in children with primary epistaxis’

We are writing in reference to the paper titled ''Evaluation of vitamin D levels in children with primary epistaxis'' [1]. Almis et al. aimed to investigate whether there is a relationship between serum 25-hydroxy vitamin D [25(OH)D 3] values and incidences of primary epistaxis among children. For that purpose, the authors compared 42 primary epistaxis cases and 55 matched controls, retrospectively, and found that serum 25(OH)D 3 values were lower in the primary epistaxis group compared with the healthy control group.

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