European neurology · 2007
Contribution of hematocrit to early mortality after ischemic stroke.
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Sacco Simona, Marini Carmine, Olivieri Luigi, Pistoia Francesca, Carolei Antonio
Аннотация
BACKGROUND: Only a few non-recent studies assessed the importance of hematocrit (HCT) in patients with ischemic stroke. We evaluated how HCT might affect early mortality after stroke.
METHODS: We investigated all first-ever ischemic strokes included in the population-based L'Aquila registry. 3,481 patients according to HCT (%) values were included into four categories (<or=40, 41-45, 46-50, and >50).
RESULTS: There were more men than women with HCT >50 (6.6 vs. 2.8%; p < 0.0001) and more women than men with HCT <or=40 (48.5 vs. 37.9%; p < 0.0001). Proportions of chronic atrial fibrillation (p = 0.0053) increased in women from the lower to the higher HCT categories. 7- and 28-day case-fatality rates were similar in men and women in the lower HCT categories but higher in women than in men in the higher categories. At the 28-day Kaplan-Meier analysis, men had similar survivals in the different categories while women with HCT >50 showed the worst survival (p < 0.0001). At the multivariate Cox regression analysis HCT 46-50 and >50 was an independent predictor of mortality in women within 28 days.
CONCLUSION: High HCT might represent in women a previously underestimated independent predictor of mortality after ischemic stroke. Consideration of HCT in future stroke trials would be useful for ameliorating stroke care, especially in women.
METHODS: We investigated all first-ever ischemic strokes included in the population-based L'Aquila registry. 3,481 patients according to HCT (%) values were included into four categories (<or=40, 41-45, 46-50, and >50).
RESULTS: There were more men than women with HCT >50 (6.6 vs. 2.8%; p < 0.0001) and more women than men with HCT <or=40 (48.5 vs. 37.9%; p < 0.0001). Proportions of chronic atrial fibrillation (p = 0.0053) increased in women from the lower to the higher HCT categories. 7- and 28-day case-fatality rates were similar in men and women in the lower HCT categories but higher in women than in men in the higher categories. At the 28-day Kaplan-Meier analysis, men had similar survivals in the different categories while women with HCT >50 showed the worst survival (p < 0.0001). At the multivariate Cox regression analysis HCT 46-50 and >50 was an independent predictor of mortality in women within 28 days.
CONCLUSION: High HCT might represent in women a previously underestimated independent predictor of mortality after ischemic stroke. Consideration of HCT in future stroke trials would be useful for ameliorating stroke care, especially in women.