《Table 1 Clinical characteristics of the study population》

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《Decreased numbers of circulating endothelial progenitor cells are associated with hyperglycemia in patients with traumatic brain injury》

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Data are expressed as n（%）with the exception of age[mean±SEM（range）].Statistical significances of difference between groups were determined by Student’s t test（continuous variables）or by chi-square test（categorical variables）.TBI:Traumatic brain

In total，101 patients with TBI were initially recruited.Seventeen patients who received more than 1800 mL of blood transfusion were excluded，because the amount of transfused blood noticeably affects the levels of circulating EPCs（data not shown）.Table 2 shows that the circulating EPCs in the patients receiving less than 1800 mL blood transfusion（n=27）were not statistically different from non-blood transfused patients（n=57）at all five time points（repeated measure analysis of variance，blood transfused subjects versus non-blood transfused subjects，transfusion:F=2.012，P=0.160；time course:F=7.659，P<0.05；the transfusion andtime course interaction:F=1.485，P=0.206）.Therefore，84TBI patients were enrolled for analysis.