Diabetes Intervention Study. Multi-intervention trial in newly diagnosed NIDDM

Area of Science:

• Cardiovascular Disease Prevention
• Diabetes Mellitus Management
• Public Health Interventions

Background:

• Non-insulin-dependent diabetes mellitus (NIDDM) is associated with increased coronary risk factors and ischemic heart disease (IHD).
• Lifestyle modifications are crucial for managing NIDDM and its complications.

Purpose of the Study:

• To evaluate the efficacy of intensified health education (IHE) in improving metabolic control in NIDDM patients.
• To assess the impact of IHE on coronary risk factors and the incidence of ischemic heart disease (IHD).
• To determine the additional benefit of clofibric acid in conjunction with IHE.

Main Methods:

• A 5-year randomized multi-intervention trial involving 1139 middle-aged NIDDM patients.
• Intervention group received structured IHE (dietary advice, smoking/alcohol cessation, physical activity enhancement).
• Subgroup analysis within the IHE group evaluated clofibric acid versus placebo.

Main Results:

• IHE significantly improved glycemic control and reduced the need for antidiabetic drugs.
• IHE led to increased polyunsaturated to saturated fatty acid ratio, enhanced physical activity, and reduced blood pressure, tobacco, and alcohol consumption.
• Despite improvements in risk factors, IHE did not affect blood lipids or prevent myocardial infarction and IHD incidence; clofibric acid only reduced triglycerides.

Conclusions:

• Intensified health education (IHE) offers substantial benefits for glycemic control and risk factor reduction in NIDDM patients.
• The lack of effect on blood lipids may explain the failure of IHE and clofibric acid to prevent cardiovascular complications.
• Clofibric acid demonstrated efficacy solely in lowering triglyceride levels.