Fig. 1

Numbers of circulating endothelial progenitor cells. a FACS analysis of CD34/CD133-positive cells in the peripheral blood mononuclear cell fraction of healthy volunteers (n = 15), non-septic intensive care unit (ICU) patients (n = 11) and septic patients (n = 30). Significant differences were found between the three groups. b FACS analysis of CD34/CD133-positive cells of septic patients, stratified for survival. Data are given as mean ± SEM; * marks a significant difference (p < 0,05), ^# marks a significant influence on EPC on survival-probability in logistic regression analysis including CXCR-4-expression as supressing variable (p = 0,037, odds ratio = 0,167)