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Table 4 Distinguishing features of type 1 and type 2 diabetes mellitus

From: Metabolic syndrome, dyslipidemia, hypertension and type 2 diabetes in youth: from diagnosis to treatment

  T1D T2D
Start Abrupt and symptomatic Slow consolidation, with few symptoms
Family history 5% T1D 75-100% T2D
Insulin resistance uncommon common
Obesity Obese, normal or thin Typically present
Polidypsia, poliuria symptomatic Usually absent or mild
Ketoacidosis 30-40% at diagnosis 5-25 % at diagnosis
Hypertension and hyperlipemia - +
Sleep apnea - +
Acanthosis nigricans - +
Polycystic ovary - +
C-peptide levels Low Normal or elevated
Anti-pancreatic antibodies + (70-90%) Absent
Acanthosis nigricans - +
  1. T1D: type 1 diabetes; T2D: type 2 diabetes.