Psychological disorders and dietary patterns by reduced-rank regression

Area of Science:

• Nutrition Science
• Psychology
• Public Health

Background:

• Dietary patterns significantly influence mental well-being.
• Understanding the link between diet and psychological disorders is crucial for public health.
• Previous research suggests specific nutrients and food groups impact mental health.

Purpose of the Study:

• To investigate the association between dietary patterns and psychological disorders in Iranian adults.
• To identify specific dietary patterns linked to reduced risk of depression and anxiety.
• To utilize reduced-rank regression for deriving dietary patterns.

Main Methods:

• Cross-sectional study of 3363 Iranian adults (20-55 years).
• Dietary intake assessed via a food frequency questionnaire.
• Psychological health evaluated using validated scales for anxiety and depression.
• Reduced-rank regression identified patterns based on key nutrient ratios (omega-3/omega-6, zinc, magnesium, vitamin B6, folic acid).
• Logistic regression analyzed the relationship between dietary patterns and psychological disorders.

Main Results:

• Three dietary patterns emerged: "healthy," "fish and poultry," and "transitional."
• "Healthy" pattern significantly reduced odds of depression, anxiety, and psychological distress.
• Higher adherence to "fish and poultry" and "transitional" patterns also showed inverse relationships with depression and anxiety.
• Significant inverse correlations were observed between the "transitional" pattern and depression, anxiety, and psychological distress.

Conclusions:

• "Healthy," "fish and poultry," and "transitional" dietary patterns are associated with a lower likelihood of psychological disorders.
• These findings highlight the protective role of specific dietary habits against mental health issues.
• Prospective studies are recommended to establish causality.