[Diabetes mellitus--definition, classification and diagnosis]

Area of Science:

• Endocrinology
• Metabolic Disorders
• Clinical Biochemistry

Background:

• Diabetes mellitus is a group of heterogeneous metabolic disorders characterized by hyperglycemia.
• Accurate classification and diagnosis are crucial for effective diabetes management.
• Existing classifications require clear differentiation between diabetes types for clinical application.

Purpose of the Study:

• To describe current classifications of diabetes mellitus (types 1-4).
• To compare key features of type 1 and type 2 diabetes for improved discrimination.
• To summarize biochemical diagnostic criteria for fasting and oral glucose tolerance tests.

Main Methods:

• Review of current diabetes mellitus classifications.
• Comparative analysis of clinical and biochemical features of type 1 and type 2 diabetes.
• Summary of established diagnostic criteria for hyperglycemia.

Main Results:

• Detailed description of diabetes mellitus types 1-4.
• Highlighting distinct characteristics of type 1 and type 2 diabetes.
• Consolidated criteria for biochemical diagnosis of diabetes.

Conclusions:

• The study provides a framework for differentiating diabetes types.
• Standardized diagnostic criteria aid in accurate biochemical diagnosis.
• These findings support the Austrian Diabetes Association's clinical practice recommendations.