Comparison of mean levels of ABI (A) and log-transformed d-dimer (B) in the tertile groups of urinary pteridines. In multivariable analysis, age, gender, BMI, hemoglobin A1c and history of alcohol drinking were adjusted (Multivariable analysis 1 and 2). In addition, history of smoking was adjusted in Multivariable analysis 2. Asterisks denote significant differences from the 1st tertile for pteridine (∗, p < 0.05; ∗∗, p < 0.01). #, a marginally significant difference from the 1st tertile for pteridine (p = 0.077).