Diet quality and depression risk
In the SUN cohort, higher adherence to Mediterranean, pro-vegetarian, and AHEI-2010 diet scores tracked with lower risk of incident depression over about 8.5 years.
Source
A longitudinal analysis of diet quality scores and the risk of incident depression in the SUN Project
What they did
Investigators followed 15,093 Spanish adults free of depression at baseline, scored diet quality with MDS, PDP, and AHEI-2010, and estimated hazard ratios for new physician-diagnosed depression.
What they found
Better adherence to all three diet-quality scores predicted lower depression risk, with a threshold-like rather than strictly linear dose–response; PDP highest vs lowest quintile HRs were about 0.78 (baseline) and 0.74 (updated diet).
The limits
What it doesn't show
Observational associations cannot prove diet causes less depression, and residual confounding or self-report bias may remain.
Key terms
- SUN Project
- Spanish dynamic cohort studying diet and lifestyle determinants of chronic disease.
- MDS
- Mediterranean Diet Score reflecting traditional Mediterranean eating patterns.
- PDP
- Pro-vegetarian Dietary Pattern emphasizing plant foods over animal foods.
- AHEI-2010
- Alternative Healthy Eating Index 2010 scoring diet quality components.
- Incident depression
- New depression cases arising during follow-up among those free at baseline.
- Hazard ratio
- Relative instantaneous risk comparing exposure groups over time.
Flashcards
Want these cards to stick?
Save the deck to NoteFren and study it with spaced repetition.
Quiz yourself
What study design is this?
Common questions
How large was the analytic sample?
15,093 participants after exclusions.
How many new depression cases occurred?
1,051 incident cases over a median 8.5 years.
Which diets were scored?
Mediterranean Diet Score, Pro-vegetarian Dietary Pattern, and AHEI-2010.
Was the diet–depression link linear?
No; authors describe a threshold pattern with most benefit from low to moderate adherence.
More on Depression treatment