Dietary patterns and accelerated multimorbidity in older adults

Area of Science:

• Gerontology
• Nutritional Epidemiology
• Public Health

Background:

• Diet significantly impacts disease development and the progression of multiple chronic conditions (multimorbidity).
• Understanding the relationship between specific dietary patterns and multimorbidity accumulation is crucial for preventative health strategies in aging populations.

Purpose of the Study:

• To investigate the association between adherence to four distinct dietary patterns and the 15-year accumulation of multimorbidity in older adults.
• To explore how diet quality influences the rate of chronic disease development across different organ systems and demographic groups.

Main Methods:

• Analysis of data from 2,473 community-dwelling older adults in the Swedish SNAC-K cohort over a 15-year period.
• Multimorbidity was quantified by the total number of chronic conditions, categorized by organ system.
• Statistical models assessed the relationship between adherence to the Mediterranean-DASH Diet Intervention for Neurodegenerative Delay, Alternative Healthy Eating Index, Alternative Mediterranean Diet, and Empirical Dietary Inflammatory Index, and the annual rate of multimorbidity accumulation.

Main Results:

• Higher adherence to the Mediterranean-DASH Diet Intervention for Neurodegenerative Delay, Alternative Healthy Eating Index, and Alternative Mediterranean Diet was associated with a slower annual rate of chronic disease accumulation.
• Conversely, greater adherence to the Empirical Dietary Inflammatory Index was linked to a faster rate of multimorbidity accumulation.
• These associations were significant for cardiovascular and neuropsychiatric diseases, but not for musculoskeletal diseases, and varied by sex and age.

Conclusions:

• Diet quality is a significant modifiable risk factor for multimorbidity progression in older adults.
• Findings suggest potential benefits of promoting specific healthy dietary patterns to mitigate chronic disease accumulation and inform public health policies.
• Dietary recommendations may play a role in clinical practice for managing aging populations and preventing complex health conditions.