Abstract:
BACKGROUND AND PURPOSE:Iron is an essential element for the human body. It has, however, been suggested that excessive iron stores may increase the risk of vascular disease. So far, epidemiologic studies on stroke are sparse. METHODS:We studied the association between iron status and stroke risk in a population-based cohort of 11 471 Dutch postmenopausal women between 49 and 70 years of age. Women were included between 1993 and 1997 and followed up until January 1, 2000, for cerebrovascular events. We conducted a case-cohort study by using all stroke cases (n=63) and a random sample of the baseline cohort (n=1134). Serum ferritin, serum iron, and transferrin saturation were measured as markers of iron status. A weighted Cox proportional-hazards model was used to estimate crude and multivariate-adjusted hazard ratios for tertiles of different iron parameters in relation to stroke. RESULTS:In a multivariate model, the highest tertile of serum ferritin concentration was associated with an increased risk of stroke (hazard ratio [HR], 1.45; 95% confidence interval [CI], 0.87 to 2.42) compared with the lowest tertile. For ischemic stroke, the increase was more pronounced (HR, 2.23; 95% CI, 1.05 to 4.73) and reached statistical significance. CONCLUSIONS:Neither serum iron nor transferrin saturation was associated with an increased stroke risk. However, higher serum ferritin concentrations in postmenopausal women are associated with an increased risk of ischemic stroke.
journal_name
Strokejournal_title
Strokeauthors
van der A DL,Grobbee DE,Roest M,Marx JJ,Voorbij HA,van der Schouw YTdoi
10.1161/01.STR.0000173172.82880.72subject
Has Abstractpub_date
2005-08-01 00:00:00pages
1637-41issue
8eissn
0039-2499issn
1524-4628pii
01.STR.0000173172.82880.72journal_volume
36pub_type
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