Document Type : Review Articles

Authors

1 Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran

2 Nutrition Research Center, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran

3 The Early Life Research Unit, Academic Division of Child Health, Obstetrics and Gynaecology, and Nottingham Digestive Disease Centre and Biomedical Research Centre, The School of Medicine, The University of Nottingham, Nottingham, NG7 2UH, United Kingdom

Abstract

Background: Heart failure (HF) is a clinical disorder and Zinc is an important cofactor in regulating oxidative status.The present study aimed to determine the mean concentration of serum zinc in patients with HF.
Methods: PubMed, Embase, Scopus, and Web of Science were used in the present systematic review and meta-analysis to find relevant cross-sectional studies up to 1st January 2020. A random-effects model was used to pool the effect size (ES) and 95 % confidence intervals (CI). In addition, meta-regression analysis was performed to find the sources of statistical heterogeneity among the studies.
Results: Our meta-analysis of 1358 HF patients indicated that their mean serum zinc concentration was 66.24 µg/dl (95 % CI: 59.16, 73.33). In sub-analysis, the mean concentration was 75.04 µg/dl and 52.90 µg/dl in patients < 65 years and > 65 years old, respectively. Subgroup analysis by geographical region showed that mean serum zinc was 70.70 µg/dl, 69.08 µg/dl and 60.91 µg/dl in HF patients from Europe, America, and Asia, respectively. Meta-regression analysis indicated a reduction of 1.42 µg/dl in serum zinc per each year of aging.
Conclusion: In summary, our meta-analysis indicates that serum zinc concentrations have a narrow range in HF patients worldwide that declines with age and varies with geographical region. Additionally, serum zinc concentrations are lower in HF patients, specifically in the elderly.

Keywords

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