Dietary Fat Quality and Pre-diabetes: A Case-control Study.

Area of Science:

• Nutrition Science
• Metabolic Health
• Dietary Assessment

Background:

• The link between dietary fat quality (DFQ) and pre-diabetes remains underexplored.
• Understanding this relationship is crucial for public health and preventative strategies.

Purpose of the Study:

• To investigate the association between specific dietary fatty acid intakes and DFQ indices with pre-diabetes.
• To evaluate the utility of DFQ indices in understanding glucose metabolism disturbances.

Main Methods:

• A case-control study involving 150 normal fasting blood glucose (FBG) subjects and 147 pre-diabetic subjects.
• Dietary intake assessed using a validated food-frequency questionnaire.
• Calculation of DFQ indices: atherogenicity (AI), thrombogenicity (TI), hypo- to hypercholesterolemic (h:H), polyunsaturated to saturated (P:S), and n-3 to n-6 fatty acid ratios. FBG and oral glucose tolerance tests (OGTT) were performed.

Main Results:

• Positive association between saturated fatty acid (SFA) intake (total, myristic, palmitic) and pre-diabetes.
• Negative association between omega-3 (n-3) polyunsaturated fatty acids (PUFAs) and pre-diabetes.
• Atherogenicity index (AI) positively associated with pre-diabetes (OR 6.68); n-3:n-6 ratio (OR 0.37) and h:H ratio (OR 0.20) inversely associated with pre-diabetes.

Conclusions:

• Higher dietary n-3 fatty acid intake is associated with lower pre-diabetes risk, while higher SFA intake is linked to increased risk.
• DFQ indices, such as n-3:n-6 and h:H ratios, appear to be valuable indicators for assessing fat intake patterns and their relation to blood glucose regulation.