Dietary antioxidant capacity and all-cause and cause-specific mortality in the E3N/EPIC cohort study

Nadia Bastide, Laureen Dartois, Valérie Dyevre, Laure Dossus, Guy Fagherazzi, Mauro Serafini, Marie Christine Boutron-Ruault*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

42 Citations (Scopus)

Abstract

Purpose: The cellular oxidative stress (balance between pro-oxidant and antioxidant) may be a major risk factor for chronic diseases. Antioxidant capacity of human diet can be globally assessed through the dietary non-enzymatic antioxidant capacity (NEAC). Our aim was to investigate the relationship between the NEAC and all-cause and cause-specific mortality, and to test potential interactions with smoking status, a well-known pro-oxidant factor. Methods: Among the French women of the E3N prospective cohort study initiated in 1990, including 4619 deaths among 1,199,011 persons-years of follow-up. A validated dietary history questionnaire assessed usual food intake; NEAC intake was estimated using a food composition table from two different methods: ferric ion reducing antioxidant power (FRAP) and total radical-trapping antioxidant parameter (TRAP). Hazard ratio (HR) estimates and 95 % confidence intervals (CI) were derived from Cox proportional hazards regression models. Results: In multivariate analyses, FRAP dietary equivalent intake was inversely associated with mortality from all-causes (HR for the fourth vs. the first quartile: HR4 = 0.75, 95 % CI 0.67, 0.83, ptrend < 0.0001), cancer, and cardiovascular diseases. Similar results were obtained with TRAP. There was an interaction between NEAC dietary equivalent intake and smoking status for all-cause and cardiovascular disease mortality, but not cancer mortality (respectively, for FRAP, pinter = 0.002; 0.013; 0.113, results were similar with TRAP), and the association was the strongest among current smokers. Conclusion: This prospective cohort study highlights the importance of antioxidant consumption for mortality prevention, especially among current smokers.

Original languageEnglish
Pages (from-to)1233-1243
Number of pages11
JournalEuropean Journal of Nutrition
Volume56
Issue number3
DOIs
Publication statusPublished - 1 Apr 2017
Externally publishedYes

Keywords

  • All-cause and cause-specific mortality
  • E3N study
  • FRAP
  • Non-enzymatic antioxidant capacity
  • TRAP

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