| Subjects with Stable Plaques | Subjects with Unstable Plaques |  |
---|---|---|---|
 | (n = 23) | (n = 8) | p |
CD133+ progenitor cells (cells/μl) | 0.14 [0.07] ± 0.04 | 0.09 [0.07] ± 0.03 | n.s. |
VEGFR2+CD34+ progenitor cells (cells/μl) | 0.15 [0.12] ± 0.04 | 0.17 [0.14] ± 0.04 | n.s. |
CXCR4 surface expression on CD133+ progenitor cells | 65.78 [62.6] ± 3.76 | 86.74 [87.57] ± 5.64 | 0.009 |