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Serum and Dietary Magnesium and Risk of Ischemic Stroke: The Atherosclerosis Risk in Communities Study – Source: American Journal of Epidemiology, Apr 16, 2009

  [ 31 votes ]   [ 2 Comments ]
By Tetsuya Ohira, Aaron R Folsom, et al. • • April 22, 2009

The authors sought to examine the relation between serum [in the blood] or dietary magnesium and the incidence of ischemic stroke [involving blockage] among blacks and whites.

Between 1987 and 1989, 14,221 men and women aged 45 to 64 years took part in the first examination of the Atherosclerosis Risk in Communities Study cohort. The incidence of stroke was ascertained from hospital records.

• Higher serum magnesium levels were associated with lower prevalence of hypertension and diabetes mellitus at baseline.

• During the 15-year follow-up:

- 577 ischemic strokes occurred.

- Serum magnesium was inversely associated with ischemic stroke incidence [higher magnesium levels, lower stroke incidence].

- The age-, sex-, and race-adjusted rate ratios of ischemic stroke for those with serum magnesium levels of [equal to or less than] 1.5, 1.6, 1.7 mEq/L and 1.8 mEq/L [or more] were 1.0, 0.78 (95% confidence interval (CI): 0.62, 0.96), 0.70 (95% CI: 0.56, 0.88), and 0.75 (95% CI: 0.59, 0.95) (P trend = 0.005). After adjustment for hypertension and diabetes, the rate ratios were attenuated to nonsignificant levels.

- Dietary magnesium intake was marginally inversely associated with the incidence of ischemic stroke (P trend = 0.09).

Low serum magnesium levels could be associated with increased risk of ischemic stroke, in part, via effects on hypertension and diabetes.

Source: American Journal of Epidemiology, Apr 16, 2009. PMID: 19372211, by Ohira T, Peacock JM, Iso H, chambless LE, Rosamond WD, Folsom AR. Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, USA. [E-mail:]

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Article Comments Post a Comment

Difference in serum and dietary magnesium?
Posted by: jeannemarie
May 1, 2009
This abstract appears to say that dietary magnesium level was only marginally relevant to stroke incidence. Wouldn't dietary supplementation affect serum Mg level?
Reply Reply

Magnesium testing
Posted by: Diegolady
May 4, 2009
Here is a quote from a great book I am reading, "The Magnesium Miracle", by Carolyn Dean, M.D., N.D.; "Less than 1% of our body's total magnesium can be measured in our blood; the rest is busily occupied in the cells and tissues or holding our bones together. Therefore, it is virtually impossible to make an accurate assessment of the level of magnesium in various body tissue cells using routine serum magnesium test." Hope that helps you understand.
Reply Reply
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