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Abstract Title:

Serum selenium concentrations and risk of all-cause and heart disease mortality among individuals with type 2 diabetes.

Abstract Source:

Am J Clin Nutr. 2021 Oct 19. Epub 2021 Oct 19. PMID: 34664061

Abstract Author(s):

Zixin Qiu, Tingting Geng, Zhenzhen Wan, Qi Lu, Jingyu Guo, Liegang Liu, An Pan, Gang Liu

Article Affiliation:

Zixin Qiu

Abstract:

BACKGROUND: The impact of selenium status on the long-term health of people with type 2 diabetes (T2D) remains unclear.

OBJECTIVES: To prospectively examine the association of serum selenium concentrations with all-cause and heart disease mortality among individuals with T2D.

METHODS: This analysis included 3199 adults with T2D from the third NHANES (NHANES III) and NHANES (2003-2004, 2011-2014). Mortality from heart disease and all causes was linked to National Death Index mortality data. Cox proportional hazard models were used to estimate HRs and 95% CIs.

RESULTS: The median (IQR) concentration of serum selenium was 127.0 (115.0, 139.1)µg/L. During an average 12.6-y follow-up, 1693 deaths were documented, including 425 heart disease deaths. Compared with participants in the lowest quartile of selenium, the multivariate-adjusted HRs (95% CIs) for participants in the highest quartile were 0.69 (0.54, 0.89) for all-cause mortality (P-trend = 0.002) and 0.66 (0.45, 0.99) for heart disease mortality (P-trend = 0.03). In addition, a linear dose-response relation between serum selenium (range: 89-182 µg/L) and mortality was observed. For per-unit increment in natural log-transformed serum selenium, there was a 64% lower riskof all-cause mortality and a 66% lower risk of heart disease mortality (both P < 0.05). Similar results were observed when stratifying by age, sex, race, smoking status, BMI, physical activity, diabetes duration, and HbA1c concentrations.

CONCLUSIONS: Our study suggested that higher selenium concentration was associated with lower all-cause and heart disease mortality among individuals with T2D. More studies are needed to confirm these findings.

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