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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.
Background And Aims:
Dietary patterns are associated with risk of cardiovascular disease (CVD). We aimed to examine associations of the Dietary Inflammatory Index (DII) and the Mediterranean Diet Score (MDS) with total, cardiovascular disease (CVD) and coronary heart disease (CHD) mortality in the Melbourne Collaborative Cohort Study; and compare the strengths of the associations.
Methods And Results:
In our prospective cohort study of 41,513 men and women aged 40-69 years, a food frequency questionnaire was completed at baseline and mortality data were obtained via linkage with local and national registries over an average of 19 years follow up. At baseline, questionnaires were completed and physical measures and blood samples taken. Cox proportional hazards models, adjusting for age, alcohol consumption, sex, region of origin, personal history of CVD or diabetes and family history of CVD, were used to assess associations between dietary scores and mortality. More Mediterranean or less inflammatory diets were associated with lower total, CVD and CHD mortality. The hazard ratio for total mortality comparing the highest and lowest quintiles was 1.16 (95%CI: 1.08-1.24) for DII; and 0.86 (95%CI: 0.80-0.93) comparing the highest and lowest three categories of MDS. Using the Bayesian information criterion, there was no evidence that the DII score was more strongly associated with total and CVD mortality than was the MDS.
Conclusions:
The MDI and the DII show similar associations with total and cardiovascular mortality, consistent with the consensus that plant-based diets are beneficial for health.
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