Table 2. Bivariate Associations Between Changes in CPCs With Stress Testing and Clinical Characteristics.
| Variable | Change in CD34+ | Change in CD34+/CXCR4+ | ||
|---|---|---|---|---|
| β | P Value | β | P Value | |
| Demographics | ||||
| Age, y | 0.08 | .18 | 0.12 | .05 |
| Men | −0.05 | .38 | −0.05 | .39 |
| Black race | 0.18 | .004 | 0.09 | .03 |
| Smoking history | 0.07 | .24 | −0.05 | .37 |
| BMI | −0.01 | .79 | 0.04 | .48 |
| Comorbidity | ||||
| Hypertension | 0.09 | .13 | 0.08 | .16 |
| Diabetes | 0.04 | .45 | 0.04 | .47 |
| History of CABG | −0.01 | .77 | −0.04 | .52 |
| History of PCI | 0.02 | .71 | −0.04 | .50 |
| Heart failure | −0.01 | .81 | −0.001 | .98 |
| Magnitude of ischemia | −0.14 | .006 | −0.18 | <.001 |
Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); CABG, coronary artery bypass graft; CPC, circulating progenitor cell; PCI, percutaneous coronary intervention.