Additional file 1: of Vitamin D status is associated with skin autofluorescence in patients with type 2 diabetes mellitus: a preliminary report

Linear regression analysis of serum 25 (OH)D as independent variable and skin auto fluorescence as dependent variable. Model 1: crude analysis. Model 2: as model 1 + age, ethnicity, season, smoking, and BMI. Model 3: as model 2 + sun exposure, diabetes duration, CVD, HbA1c, eGFR, AF (this should be AP), and LDL cholesterol. 25(OH)D 25-hydroxyvitamin D, AGE advanced glycation end product, AP alkaline phosphatase, BMI body mass index, CVD cardiovascular disease, LDL low density lipoprotein.