Figure 2.

Event-free survival according to the level of osteocalcin positive ‘early’ endothelial progenitor cells. The Kaplan–Meier event-free survival according to a median split of osteocalcin positive ‘early’ endothelial progenitor cells. Values representing exactly the median value were attributed to the lower half group. Red: lower half of osteocalcin positive early endothelial progenitor cell count, n = 135, 5 events; Blue: upper half of osteocalcin positive early endothelial progenitor cell counts, n = 124, 17 events. P = 0.036 (logrank). Composite endpoint: death, MI, ACS, unstable angina pectoris, TIA, or stroke.