Highlights
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Summary
Background
Nutritional strategies for the prevention and management of type 2 diabetes traditionally emphasize dietary patterns that reflect nutritional goals, but the health implications of ultra-processed foods (UPF) for patients with type 2 diabetes remain unknown. .
Goals
This study aimed to evaluate the association of UPF intake with all-cause and cardiovascular disease (CVD) mortality among participants with type 2 diabetes in the Moli-sani Study in Italy (enrollment 2005-2010).
Methods
This was a prospective observational cohort study in 1065 people with type 2 diabetes at baseline , followed for 11.6 years (median).
Food intake was assessed using a 188-item food frequency questionnaire. UPF was defined following the Nova classification and was calculated as the ratio (weight proportion; %) between UPF (g/d) and the total food consumed (g/d).
General diet quality was assessed using the Mediterranean Diet Score (MDS). Multivariable-adjusted Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for mortality.
Results
The average UPF consumption was 7.4% (±5.0%). In Cox analysis with multivariable adjustment, the highest UPF intake (Q4, ≥10.5% and ≥9% of total foods consumed for women and men, respectively), versus the lowest (Q1, UPF <4, 7% and <3.7% for women and men, respectively), was associated with increased risks of all-cause mortality (HR: 1.70; 95% CI: 1.25, 2.33) and CVD (HR: 2.64; 95% CI: 1.59, 4.40); The inclusion of MDS in the model did not substantially alter the magnitude of these associations (HR: 1.64; 95% CI: 1.19, 2.25 and HR: 2.55; 95% CI: 1.53, 4, 24 for all-cause and CVD mortality, respectively).
A linear dose-response relationship of UPF intake with all-cause and CVD mortality was also observed.
Conclusions
In participants with type 2 diabetes at study entry, higher UPF consumption was associated with reduced survival and a higher CVD mortality rate, regardless of diet quality.
In addition to prioritizing the adoption of a diet based on nutritional requirements, dietary guidelines for the management of type 2 diabetes should also recommend limiting the intake of ultra-processed foods (UPF).