ATTICA Study Links Better Diet Quality to Lower Heart Failure Risk
Dietary patterns recorded at the start of a 20-year tracking period show a clear link to the odds of developing heart failure later in life, according to findings from the ATTICA Cohort Study published in the journal Nutrients.
Key Clinical Takeaways:
- Each 1-point increase in the Global Diet Quality Score (GDQS) correlated with a 3% decrease in heart failure odds after researchers controlled for variables like age, sex, body mass index, and diabetes.
- Eating more health-promoting foods drove the protective association, while scores for less healthy foods showed no independent link to heart failure over the two decades.
- Study participants starting with the lowest diet quality scores faced a crude heart failure incidence of 20.7%, compared to 5.1% in the intermediate group and 6.6% in the highest group.
Two Decades of Tracking Dietary Habits in Greece
Researchers in Greece launched the prospective ATTICA study between May 2001 and August 2002 to evaluate how everyday food choices and baseline health metrics relate to long-term cardiovascular outcomes. Out of 4,056 adults initially invited across the Attica region, 3,042 met the enrollment criteria by being free of cardiovascular disease, cancer, and inflammatory conditions. By the 20-year follow-up, investigators gathered complete medical outcomes and lifestyle data for 2,159 participants, documenting 241 incident cases of heart failure. Physician evaluations and medical records verified these diagnoses using International Classification of Diseases, 10th Revision (ICD-10) criteria.
Scoring Diet Quality with the GDQS
Trained dietitians administered a validated 156-item semi-quantitative food-frequency questionnaire at baseline to capture habitual dietary intake, which investigators mapped to 25 food groups under the Global Diet Quality Score. The GDQS scale ranges from 0 to 49, separating foods into healthy (GDQS+) and less favorable (GDQS−) components. Participants with the lowest baseline scores tended to be older, included a higher proportion of men, and presented with elevated body mass indices along with higher rates of hypertension, diabetes, and hypercholesterolemia. Unadjusted data revealed that heart failure incidence dropped significantly when comparing the lowest scoring tertile to the intermediate and highest tiers.
Adjusting for Metabolic Risk Factors and Confounders
Statistical models that adjusted for age, sex, body mass index, education, physical activity, smoking, hypertension, diabetes, and hypercholesterolemia demonstrated that every single-point increase in overall diet quality reduced heart failure odds by 3%. When isolating the health-promoting food components, each 1-point increase in the GDQS+ score lowered heart failure odds by 4%. Conversely, the less healthy food score component did not maintain an independent association with heart failure incidence.
The observational design of the research prevents any definitive causal conclusions about diet and heart failure development. Investigators assessed dietary intake only at baseline in 2001 and 2002, leaving open the possibility that participants changed their eating habits over the subsequent 20 years. Missing heart failure subtype information, potential dietary reporting errors, and the exclusion of participants lost to follow-up introduce uncertainties into the magnitude of the observed associations. Additional prospective investigations are needed to clarify the exact biological pathways linking long-term dietary patterns to myocardial health.
Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.