Table 3.
Determinants of FFR in Multivariate Linear Regression Analysis (849 Lesions)
| 95% CI | ||||
|---|---|---|---|---|
| Coefficient ß | Lower | Upper | P Value | |
| Age, y | 0.0016 | 0.0012 | 0.0020 | 0.001 |
| QCA‐DS, % | −0.0031 | −0.0033 | −0.0029 | <0.001 |
| QCA‐RD, mm | 0.0359 | 0.0309 | 0.0409 | <0.001 |
| CFR | 0.0223 | 0.0200 | 0.0246 | <0.001 |
| IMR | 0.0013 | 0.0011 | 0.0015 | <0.001 |
CFR indicates coronary flow reserve; FFR, fractional flow reserve; IMR, the index of microcirculatory resistance; QCA‐DS, diameter stenosis assessed by QCA; QCA‐RD, reference diameter assessed by quantitative coronary angiography (QCA).