16 When subjects were categorized into normal (>30 ng/mL or 75 nmol/L), low (16–30 ng/mL or 40–75 nmol/L) or very low (≤15 ng/mL or 37.5 nmol/L) vitamin D level groups, it was also found that there were highly significant graded inverse associations with hypertension, hyperlipidemia, diabetes mellitus, and PAD.
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