Table 2. Univariate predictors of the presence of coronary artery collaterals.
| Variable | Estimate (x104) | p value |
| Angiogenic and angiostatic factors | ||
| Angiogenic | ||
| CXCL1 | +0.022 | 0.428 |
| CXCL3 | +2.895 | 0.056 |
| CXCL5 | +0.406 | 0.041 |
| CXCL8 | +1.154 | 0.277 |
| CXCL12 | +0.579 | 0.169 |
| CCL2 | +5.445 | 0.246 |
| VEGF* | −0.385 | 0.604 |
| bFGF† | +0.346 | 0.100 |
| Angiostatic | ||
| CXCL9 | +0.014 | 0.722 |
| CXCL10 | +0.137 | 0.618 |
| CXCL11 | −1.350 | 0.027 |
| IFN-γ‡ | −3.858 | 0.013 |
| Clinical factors | ||
| Hypertension | −2.275 | 0.006 |
| Diabetes | −1.017 | 0.053 |
| Current tobacco use | −0.418 | 0.431 |
| Family history of coronary artery disease | −0.214 | 0.666 |
| Hyperlipidemia | +2.087 | 0.032 |
| Prior angina pectoris | −0.566 | 0.259 |
| Peripheral vascular disease | +0.088 | 0.891 |
| Congestive heart failure | −0.522 | 0.586 |
| History of cardiac arrhythmias | −0.200 | 0.797 |
| Prior myocardial infarction | +0.727 | 0.165 |
| Prior stroke | −1.203 | 0.187 |
| Prior percutaneous coronary intervention | −0.841 | 0.120 |
| Prior coronary artery bypass surgery | −1.734 | 0.006 |
| Presence of an occluded artery | +4.302 | <0.0001 |
| Number of diseased vessels | −0.003 | 0.990 |
*VEGF = vascular endothelial growth factor, †bFGF = basic fibroblast growth factor, ‡IFN = interferon.