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Result: The mean age was 53 (±10) years. Seven hundred fifty-eight (64.2%) were females, 681 (57.7%) were type 2 diabetic and 500 (42.3%) were pre-diabetic. Low serum vitamin D level (vitamin D <30 ng/ml) was seen in 467 (68.8%) of the diabetic patients and in 381 (76.2%) pre-diabetics compared to 1,101 (36.6%) in control group. The main risk factors associated with low serum vitamin D level were lack of sun exposure and milk consumption.
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Al-Dairi et al. (2015) studied this question.
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