Association of serum selenium with anemia‐related indicators and risk of anemia. Issue 6 (27th March 2021)

• Record Type: Journal Article
• Authors: Zhou, Qing; Zhang, Baozhu; Chen, Xi; Chen, Qiuyan; Hao, Lu
• Is Part Of: Food science & nutrition. Volume 9:Issue 6(2021)
• Page Start: 3039
• Page End: 3047
• Publication Date: 2021-03-27
• Subjects: anemia -- cross‐sectional study -- hemoglobin concentrations -- Selenium; Food industry and trade -- Periodicals; Food -- Periodicals; Nutrition -- Periodicals; 664
• DOI: 10.1002/fsn3.2261
• Languages: English
• ISSNs: 2048-7177

Abstract

Abstract: Few studies have examined the association of serum selenium with anemia‐related indicators and risk of anemia. We conducted a cross‐sectional analysis of 2, 902 adults in 2003–2004 National Health and Nutrition Examination Survey database. Multivariable linear and logistic regression models were used to examine the association of serum selenium with anemia‐related indicators and risk of anemia. The nonlinear relationship was analyzed using a generalized additive model with the smoothing plot. A total of 1, 472 males and 1, 430 females with a mean age of 61.94 ± 13.73 years were included. Compared with the lowest quintile, the highest quintile of serum selenium was associated with increased level of serum iron (β = 12.44, 95% confidence interval [CI]: 7.14, 17.75, p < .001), mean corpuscular hemoglobin concentration (MCHC) (β = 0.14, 95%CI: 0.02, 0.26, p = .020), and hemoglobin (β = 0.40, 95%CI: 0.19, 0.61, p < .001), and decreased risk of anemia (odds ratio [OR] = 0.47, 95%CI: 0.28, 0.77, p = .002). Furthermore, smoothed plots suggested the nonlinear relationships between serum selenium and MCHC, hemoglobin level, and risk of anemia. Interestingly, on the left of inflection point, serum selenium was associated with decreased risk of anemia (OR = 0.972, 95%CI: 0.960, 0.985, p < .001), and then, the risk of anemia increased with increasing serum selenium concentration (OR = 1.011, 95%CI: 1.002, 1.021, p = .023). Future large‐scale, polycentric prospective studies should be conducted to verify our results. Abstract : Higher serum selenium is associated with an increased serum iron level, MCHC, and hemoglobin level and a decreased risk of anemia. Due to the narrow physiological range of selenium, the relationships between selenium‐ and anemia‐related indicators and risk of anemia were nonlinear. Our findings would provide new insights on selenium nutrition that implicate anemia and human health.