Research: NINOMIYA and COLLEAGUES,

Listed in Issue 234

Abstract

NINOMIYA and COLLEAGUES, (1)Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Department of Environmental Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. nino@intmed2.med.kyushu-u.ac.jp analyzed the association between the ratio of EPA/AA or DHA/AA and cardiovascular disease in a Japanese community.

Background

The authors examined the association between the ratio of serum eicosapentaenoic acid to arachidonic acid (EPA/AA) or the docosahexaenoic acid (DHA)/AA and the development of cardiovascular disease in a general Japanese population.

Methodology

A total of 3103 community-dwelling Japanese individuals aged ≥40 years were followed up for an average of 5.1 years. Serum EPA/AA ratios were categorized into quartiles. The risk estimates were computed using a Cox proportional hazards model.

Results

During the follow-up period, 127 subjects experienced cardiovascular events. Age- and sex-adjusted incidence rates of cardiovascular disease increased with lower serum EPA/AA ratios in individuals with high-sensitivity C-reactive protein (HS-CRP) of ≥1.0 mg/L (p for trend = 0.006), whereas no clear association was observed in those with HS-CRP of <1.0 mg/L (p for trend = 0.27). The multivariable-adjusted risk of cardiovascular disease increased significantly, by 1.52 times (95% confidence interval 1.12-2.04) per 0.20 decrement in serum EPA/AA ratio in subjects with HS-CRP of ≥1.0 mg/L. A lower serum EPA/AA ratio was significantly associated with an increased risk of coronary heart disease, but there was no evidence of an association with stroke. The magnitude of the influence of the serum EPA/AA ratio on the cardiovascular risk increased significantly with elevating HS-CRP levels taken as a continuous variable (p for heterogeneity = 0.007). However, no such association was observed for DHA/AA ratio.

Conclusion

Our findings suggest that a lower serum EPA/AA ratio is associated with a greater risk of cardiovascular disease, especially coronary heart disease, among subjects with higher HS-CRP levels in the general Japanese population.

References

Ninomiya T(1), Nagata M, Hata J, Hirakawa Y, Ozawa M, Yoshida D, Ohara T, Kishimoto H, Mukai N, Fukuhara M, Kitazono T, Kiyohara Y. Association between ratio of serum eicosapentaenoic acid to arachidonic acid and  risk of cardiovascular disease: the Hisayama Study.  Atherosclerosis. 231(2):261-7. doi: 10.1016/j.atherosclerosis.2013.09.023. Dec 2013. Epub 2013 Oct 5. Erratum in Atherosclerosis. 234(2):344-5. Jun 2014; Comment in Atherosclerosis. 231(2):281-2. Dec 2013.

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