Journal of endocrinological investigation
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J. Endocrinol. Invest. · Oct 2013
Obstructive sleep apnea syndrome and its association with vitamin D deficiency.
Obstructive sleep apnea syndrome (OSAS) is a widespread disorder characterized by recurrent, partial or complete episodes of apnea due to upper airway tract obstruction during sleeping period. Deficiency of vitamin D has roles in development of many diseases. Association between presence and severity of OSAS and vitamin D has recently gained research interest. ⋯ We found that when the severity of OSAS increases, 25(OH)D deficiency becomes more pronounced.