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Background The mortality and disability associated with progressing ischemic stroke are much higher than general ischemic stroke. This study was conducted to determine the risk factors for progressing ischemic stroke in the Han population of northeast China.Methods A total of 2511 patients with ischemic stroke within 24 hours admitted to Department of Neurology, First Affiliated Hospital of Harbin Medical University were studied, from November 2007 to May 2009. All of the patients were classified into the progressing or non-progressing group according to the scores of the Scandinavian Neurological Stroke Scale. Fifteen putative risk factors were evaluated. The influence of risk factors for progressing ischemic stroke was analyzed with the simple Logistic analysis, the multiple Logistic analysis, and the stepwise Logistic regression model. All the statistical analysis was performed by SAS 9.1.Results Totally 359 (14.3%) patients met the criteria for progressing ischemic stroke. The Logistic analysis showed that age, family stroke history, smoking history, hypertension on admission, a drop in blood pressure after admission to the hospital, high serum glucose on admission, and fever were related to progressing ischemic stroke in the Han population of northeast China.Conclusion People of the ischemic stroke with these factors are more likely to develop progressing ischemic stroke.