The Predictive Potential of C-Peptide in Differentiating Type 1 Diabetes From Type 2 Diabetes in an Outpatient Population in Abu Dhabi

Identifier:  imarina:9382515

Handle: https://hdl.handle.net/20.500.11797/imarina9382515

Authors:  Iqbal, Sajid; Abu Jayyab, Abdulrahim; Alrashdi, Ayah Mohammad; Shujauddin, Syed; Clua-Espuny, Josep Lluis; Reverte-Villarroya, Silvia

Abstract:
Purpose: We aimed to investigate the predictive potential of plasma connecting peptide (C-peptide) in differentiating type 1 diabetes (T1D) from type 2 diabetes (T2D) and to inform evidence-based diabetes classification criteria. Methods: A retrospective review was performed of all the patients with diabetes visiting an outpatient diabetology, endocrinology, general practice and family medicine tertiary health care center between January 2016 and December 2021. Findings: Two hundred twelve individuals with diabetes were included, 85 (44.8%) with T1D and 127 (55.2%) with T2D. Mean (SD) age at diagnosis was 35.9 (15.1) years, and 112 (52.8%) men. Median (interquartile range [IQR]) duration of diabetes was 3.8 (3.0-4.5) years (T1D, 3.9 [3.5-4.6]; T2D, 3.4 [2.4-4.4]; P = 0.001). Body mass index was < 18.5 kg/m2 2 in 5 (2.5%) individuals (T1D, 5; T2D, none), 18.5 to < 25 kg/m2 2 in 57 (28.5%) (T1D, 32; T2D, 25), 25 to < 30 kg/m2 2 in 58 (29%) (T1D, 28; T2D, 30), and > 30 kg/m2 2 in 80 (40.0%) (T1D, 20; T2D, 60). Median (IQR) glycosylated hemoglobin was 7.4% (6.7%-8.5%) (T1D, 8.3% [7.2%-9.9%]; T2D, 7% [6.3%- 7.6%]; P = 0.0001). Median (IQR) C-peptide concentration was 0.59 nmol/L (0.01-1.14 nmol/L) (T1D, 0.01 nmol/L [0.003-0.05 nmol/L]; T2D, 1.03 nmol/L [0.70-1.44 nmol/L]; P = 0.0001). C-peptide concentration of