Postprandial C-peptide is more relevant to hemoglobin A1c levels and diabetic microvascular complications than fasting C-peptide in type 2 diabetes

Figure 1 Flowchart of patient inclusion and exclusion criteria. FCP: Fasting C-peptide; T2DM: Type 2 diabetes mellitus; 2hCP: 2 hours postprandial C-peptide.

Figure 2 Spearman correlation of C-peptide related indices and clinical variables. Numbers in the box represent correlation coefficients (r) and their 95%CIs of each two variables. ^aP < 0.05; ^bP < 0.01; ^cP < 0.001. ALT: Alanine transaminase; BG: Blood glucose; BMI: Body mass index; CP: C-peptide; Cr: Creatinine; FCP: Fasting C-peptide; FPG: Fasting plasma glucose; HbA1c: Hemoglobin A1c; HDL-C: High-density lipoprotein cholesterol; LDL-C: Low-density lipoprotein cholesterol; PBG: Postprandial blood glucose; TC: Total cholesterol; TG: Triglyceride; UA: Uric acid; 2hCP: 2 hours postprandial C-peptide.