Dietary inflammatory index or Mediterranean diet score as risk factors for total and cardiovascular mortality

A M Hodge1, J K Bassett2, P-A Dugué1

  • 1Cancer Epidemiology and Intelligence Division, Cancer Council Victoria, Melbourne, VIC, Australia; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Parkville, VIC, Australia.

Insights

Adopting a Mediterranean diet or an anti-inflammatory diet is linked to reduced cardiovascular disease (CVD) mortality. Both dietary patterns, the Mediterranean Diet Score (MDS) and the Dietary Inflammatory Index (DII), showed similar protective effects against total and CVD mortality.

Area of Science:

  • Nutritional Epidemiology
  • Cardiovascular Health
  • Public Health

Background:

  • Dietary patterns significantly influence cardiovascular disease (CVD) risk.
  • Understanding the impact of specific dietary indices on mortality is crucial for public health.
  • The Melbourne Collaborative Cohort Study provides a robust dataset for investigating these associations.

Purpose of the Study:

  • To assess the association between the Dietary Inflammatory Index (DII) and the Mediterranean Diet Score (MDS) with total, CVD, and coronary heart disease (CHD) mortality.
  • To compare the strength of association between the DII and MDS with mortality outcomes.
  • To evaluate the role of dietary patterns in cardiovascular health and longevity.

Main Methods:

  • Prospective cohort study involving 41,513 participants aged 40-69 years.
  • Food frequency questionnaires, physical measures, and blood samples collected at baseline.
  • Mortality data obtained via registry linkage over an average 19-year follow-up.
  • Cox proportional hazards models used for statistical analysis, adjusting for relevant covariates.

Main Results:

  • Higher adherence to Mediterranean diets (higher MDS) and less inflammatory diets (lower DII) were associated with reduced total, CVD, and CHD mortality.
  • Hazard ratio for total mortality comparing highest to lowest quintiles of DII was 1.16 (95%CI: 1.08-1.24).
  • Hazard ratio for total mortality comparing highest to lowest three categories of MDS was 0.86 (95%CI: 0.80-0.93).
  • No significant difference in the strength of association between DII and MDS for total and CVD mortality was found.

Conclusions:

  • Both the Mediterranean Diet Score (MDS) and the Dietary Inflammatory Index (DII) demonstrate comparable associations with total and cardiovascular mortality.
  • Findings support the consensus that plant-based and anti-inflammatory dietary patterns are beneficial for cardiovascular health.
  • Dietary choices play a significant role in mitigating the risk of mortality from cardiovascular diseases.
Abstract

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