Abstract
Background and Purpose—
We
hypothesized that total marine n-3 polyunsaturated fatty acids (PUFA),
in particular eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)
in the diet and in adipose tissue (biomarkers of long-term intake and
endogenous exposure) were inversely associated with the risk of ischemic
stroke and its subtypes.
Methods—
The
Diet, Cancer and Health cohort consisted of 57 053 participants aged 50
to 65 years at enrolment. All participants filled in a food frequency
questionnaire and had an adipose tissue biopsy taken at baseline.
Information on ischemic stroke during follow-up was obtained from The
Danish National Patient Register, and all cases were validated. Cases
and a random sample of 3203 subjects from the whole cohort had their
fatty acid composition of adipose tissue determined by gas
chromatography.
Results—
During
13.5 years of follow-up 1879 participants developed an ischemic stroke.
Adipose tissue content of EPA was inversely associated with total
ischemic stroke (hazard ratio [HR], 0.74; 95% CI, 0.62–0.88) when
comparing the highest with the lowest quartile. Also, lower rates of
large artery atherosclerosis were seen with higher intakes of total
marine n-3 PUFA (HR, 0.69; 95% CI, 0.50–0.95), EPA (HR, 0.66; 95% CI,
0.48–0.91) and DHA (HR, 0.72; 95% CI, 0.53–0.99), and higher adipose
tissue content of EPA (HR, 0.52; 95% CI, 0.36–0.76). Higher rates of
cardioembolism were seen with higher intakes of total marine n-3 PUFA
(HR, 2.50; 95% CI, 1.38–4.53) and DHA (HR, 2.12; 95% CI, 1.21–3.69) as
well as with higher adipose tissue content of total marine n-3 PUFA (HR,
2.63; 95% CI, 1.33–5.19) and DHA (HR, 2.00; 95% CI, 1.04–3.84). The EPA
content in adipose tissue was inversely associated with small-vessel
occlusion (HR, 0.69; 95% CI, 0.55–0.88).
Conclusions—
EPA
was associated with lower risks of most types of ischemic stroke, apart
from cardioembolism, while inconsistent findings were observed for
total marine n-3 PUFA and DHA.
Footnotes
Presented in part at the European Atherosclerosis Society Congress, Lisbon, Portugal, May 8, 2018.
The online-only Data Supplement is available with this article at
https://www.ahajournals.org/doi/suppl/10.1161/STROKEAHA.118.023384.
Correspondence
to Stine Krogh Venø, MD, Department of Cardiology, Aalborg University
Hospital, Søndre Skovvej 15, 9000 Aalborg, Denmark. Email
s.venoe@rn.dk
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