All models were adjusted for age, gender, race, myocardial infarction, stroke, congestive heart failure, diabetes, hypertension, waist circumference, exercise level, smoking, serum calcium, serum phosphorus, aspartate amino transferase, alanine amino transferase, bilirubin, glomerular filtration rate, serum hemoglobin, and serum fasting glucose. 25-OH vitamin D, 25-hydroxy vitamin D.