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. 2024 Oct 22;23(1):130.
doi: 10.1186/s12937-024-01029-w.

Composite dietary antioxidant index and abdominal aortic calcification: a national cross-sectional study

Zhaoxiang Wang  1 , Fengyan Tang  1 , Bo Zhao  2 , Han Yan  3   4 , Xuejing Shao  3   4 , Qichao Yang  5   6
Affiliations

Composite dietary antioxidant index and abdominal aortic calcification: a national cross-sectional study

Zhaoxiang Wang et al. Nutr J. .

Abstract

Purpose: The Composite Dietary Antioxidant Index (CDAI) is a novel, inclusive measure for evaluating the antioxidant potential of diets. We aim to explore the link between the CDAI and abdominal aortic calcification (AAC) in U.S. adults aged ≥ 40 years.

Methods: This cross-sectional study collected dietary and AAC data for individuals aged ≥ 40 years from the 2013-2014 National Health and Nutrition Examination Survey (NHANES) database. The CDAI was calculated using six dietary antioxidants. AAC was evaluated using a semi-quantitative scoring system known as AAC-24, with an AAC score greater than 6 as severe AAC (SAAC). To examine the association between CDAI and AAC, including SAAC, liner/logistic regression analyses and smooth curve fitting were applied.

Results: A total of 2,640 participants were included in this study, and significant decreases in AAC score and SAAC prevalence were observed with ascending CDAI levels (P < 0.01). After adjusting for confounding factors, a clear link was established between the CDAI and both AAC score (β = -0.083, 95% CI -0.144-0.022, P = 0.008) and SAAC (OR = 0.883, 95% CI 0.806-0.968, P = 0.008), respectively. Further smooth curve fitting indicated a negative correlation between CDAI and both AAC score and SAAC.

Conclusions: Dietary antioxidant consumption, as quantified by the CDAI, shows an inverse relationship with AAC risk. Additional longitudinal and intervention studies are essential.

Keywords: Abdominal aortic calcification; Antioxidant; CDAI; NHANES; Oxidative stress.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Results from smooth curve fitting
Fig. 2
Fig. 2
Results from subgroup analyses
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