Abstract
To analyze the relationship between serum 25(OH)D3 level and dry eye parameters in primary Sjögren syndrome (SS). This study included 74 eyes of 74 patients diagnosed with primary SS. Dry eye parameters included tear breakup time, Schirmer I value, corneal staining score, conjunctival staining score, and Ocular Surface Disease Index. The serum concentration of 25(OH)D3 was evaluated. The mean serum 25(OH)D3 level was 20.4 ± 8.0 ng/mL. There were strong negative correlations between serum 25(OH)D3 level and corneal staining score (P < 0.001, r = -0.446) and conjunctival staining score (P < 0.001, r = -0.455). The Schirmer I value and tear breakup time showed significant positive correlations with serum 25(OH)D3 level (P = 0.038, r = 0.261 and P = 0.003, r = 0.352, respectively). The Ocular Surface Disease Index did not show any significant correlation with serum 25(OH)D3 level. This study demonstrates that serum 25(OH)D3 level might be associated with dry eye severity in primary SS.
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