Vitamin D levels for 8780 Greek and 2594 Cypriot subjects were blindly collected from the hospitals’ laboratory information systems over a 5-year time period. 73.07% of the Greek and 69.28% of the Cypriot subjects of the sample had inadequate levels of vitamin D. The mean 25(OH)D value for the Greek subjects was found 25.08 ng/ml and for the Cypriots 25.37 ng/ml.
Amongst the recorded diseases growth retardation, hypercalcemia, sickle cell anemia, polyneuropathy, mental retardation and MS were related with 25(OH)D levels.
The prevalence of vitamin D deficiency is extremely high in both population samples and particularly in subjects with chronic diseases. However, the cross-sectional design of the study cannot prove causality and further prospective studies in healthy subjects are necessary.
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