Table 3.
Comparison of clinical outcomes among 4 groups classified by CKD and CFR
| Clinical outcomes | CFR > 2.0 |
CFR ≤ 2.0 |
Overall P value | ||
|---|---|---|---|---|---|
| No CKD (n = 226) | CKD (n = 27) | No CKD (n = 83) | CKD (n = 15) | ||
| Cardiac death or hospitalization of heart failure | 12.3% (27) | 33.7% (9) | 39.3% (32) | 60.0% (9) | <0.001 |
| Cardiac death | 2.7% (6) | 8.1% (2) | 17.4% (13) | 22.0% (3) | <0.001 |
| Hospitalization of heart failure | 10.1% (22) | 33.7% (9) | 34.0% (27) | 41.3% (6) | <0.001 |
CFR, coronary flow reserve; CKD, chronic kidney disease.
Data are expressed as the cumulative incidence of clinical outcomes and the number of events. Cumulative incidence of clinical outcomes represents Kaplan-Meier estimates during 3 years. Overall P values were used for log-rank test in the survival analysis, comparing the 4 groups classified according to CFR ≤ 2.0 and the presence of CKD.