Egg consumption and the risk of cardiovascular disease and all-cause mortality: Guangzhou Biobank Cohort Study and meta-analyses

Research output: Contribution to journalArticle

Authors

  • Lin Xu
  • Tai Hing Lam
  • Chao Qiang Jiang
  • Wei Sen Zhang
  • Xiao-Feng Zhu
  • Ya Li Jin
  • Jean Woo

Colleges, School and Institutes

External organisations

  • The First Affiliated Hospital of Sun Yat-Sen University
  • University of Hong Kong
  • Guangzhou No. 12 Hospital

Abstract

Purpose Eggs are highly nutritious but concerns over their cholesterol content have led to dietary avoidance among many. There are also important international differences in relevant dietary guidance. We conducted the first prospective study in China investigating the association of egg consumption, cardiovascular disease (CVD) mortality, and a meta-analysis. Methods We included 28,024 participants without CVD at baseline (2003-8) in Guangzhou Biobank Cohort Study. All-cause and CVD mortality were identified through record linkage. We used Cox proportional hazards regression. We followed the Meta-analysis Of Observational Studies in Epidemiology reporting guidelines.Results During 275,343 person-years follow-up (average 9.8 years), we found 2,685 all-cause and 873 CVD deaths. We found no significant difference in all-cause mortality between higher (7+ eggs/week) and low consumption (<1 egg/week) (adjusted hazard ratio (HR) 1.08, 95% confidence interval (CI) 0.93-1.24), and mortality from CVD (0.99, 95% CI 0.76-1.27), ischemic heart disease (IHD) (0.92, 95% CI 0.63-1.36), or stroke (0.88, 95% CI 0.57-1.35). The updated meta-analyses including our results showed that 7+ eggs/week was not associated with all-cause mortality (HR 1.09, 95% CI 0.997-1.200) or IHD (HR 0.97, 95% CI 0.90-1.05), but associated with a small reduction in stroke (HR 0.91. 95% CI 0.85-0.98).Conclusions Eating one egg daily is not associated with increase in CVD or all-cause mortality. The small observed reduction in stroke risk need to be confirmed. Our findings support current guidelines recommending eggs as part of a healthy diet, and should be considered in other dietary recommendations. 

Details

Original languageEnglish
Number of pages12
JournalEuropean Journal of Nutrition
Early online date21 Apr 2018
Publication statusE-pub ahead of print - 21 Apr 2018

Keywords

  • Egg consumption, cardiovascular disease, ischemic heart disease, mortality, stroke