Measures of albuminuria according to quintile of serum 25(OH) vitamin D.

model 1: adjusted for age, gender and race. model 2: as model 1 but additionally adjusted for BMI, weight, waist circumference, systolic and diastolic blood pressures, total:HDL cholesterol ratio, eGFR, diabetes status, HbA1c. model 3: as model 2 but additionally adjusted for history of cardiovascular disease, poverty:income ratio, smoking status, 25(OH)vitamin D, CRP, hemoglobin, calcium and season of measurement. model 4: as model 3 but additionally adjusted for PTH quintile and time of day of venepuncture. uAlb, urine albumin concentration; uCr, urine creatinine concentration; ACR, urine albumin:creatinine ratio; FEalb, fractional excretion of albumin relative to creatinine.