Indirect bilirubin is inversely associated with diabetic retinopathy risk and is a potential predictive biomarker

Figure 2 Correlations between bilirubin indices and other clinical characteristics. Spearman’s correlation analysis was used to evaluate the relationships between bilirubin indices and other clinical features in patients with type 2 diabetes mellitus. ^aP < 0.05; ^bP < 0.01, ^cP < 0.001. Statistical significance was determined at a P value < 0.05. IBIL: Indirect bilirubin; DBIL: Direct bilirubin; TBIL: Total bilirubin; SBP: Systolic blood pressure; eGFR: Estimated glomerular filtration rate; ACR: Albumin/creatinine ratio.