Additionally, the frequency of vitamin D deficiency, defined as serum 25(OH)D below 20 ng/mL, was higher in subjects with retinopathy, but this difference did not reach statistical significance ( p = 0.07).
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Vitamin D Deficiency Is Associated with the Presence and Severity of Diabetic Retinopathy in Type 2 Diabetes Mellitus.
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0.0700
0.0700