Dietary patterns and cardiovascular mortality in the Melbourne Collaborative Cohort Study

Area of Science:

• Nutrition Science
• Epidemiology
• Cardiovascular Health

Background:

• Mediterranean migrants in Australia exhibit lower cardiovascular disease mortality despite risk factors.
• Dietary patterns are hypothesized to contribute to this observed health disparity.

Purpose of the Study:

• To investigate the association between dietary patterns and mortality from cardiovascular disease (CVD) and ischemic heart disease (IHD).
• To analyze these associations within an ethnically diverse population.

Main Methods:

• Prospective cohort study of 40,653 adults aged 40-69 years in the Melbourne Collaborative Cohort Study (1990-1994).
• Utilized principal components analysis to identify dietary patterns from food-frequency questionnaires.
• Mean follow-up duration was 10.4 years, with 24% of participants being Mediterranean-born.

Main Results:

• A 'Mediterranean' dietary factor showed an inverse association with CVD and IHD mortality (HR for IHD: 0.59).
• Vegetable and fresh fruit factors were inversely associated with CVD mortality in individuals without prior CVD (HR: 0.66 and 0.69, respectively).
• No association was found between a 'meat' dietary factor and CVD or IHD mortality.

Conclusions:

• Frequent consumption of traditional Mediterranean foods is associated with reduced cardiovascular mortality.
• These findings hold after controlling for major risk factors and country of birth.
• Dietary interventions focusing on Mediterranean foods may be beneficial for cardiovascular health.