Table 2. TTFM and FFT data of graft failure and MACCEs.
| Parameters* | Patency (N=257) | Graft failure (N=63) | P | MACCEs | NO MACCEs | P |
|---|---|---|---|---|---|---|
| PI | 2.85±1.49 | 4.11±9.29 | 0.056 | 3.36±6.77 | 3.15±1.93 | 0.759 |
| MGF | 22.99±12.91 | 19.60±11.32 | 0.020 | 22.58±12.67 | 20.16±11.91 | 0.103 |
| H0 | 43.00±13.67 | 33.06±8.05 | <0.001 | 40.09±13.41 | 38.24±11.70 | 0.230 |
| H1 | 3.45±1.34 | 2.17±1.20 | <0.001 | 3.02±1.42 | 2.95±1.46 | 0.673 |
| H0/H1 | 16.45±16.00 | 33.37±75.75 | <0.001 | 23.53±17.81 | 20.15±22.24 | 0.311 |
| P | 2.46±0.94 | 3.14±0.81 | <0.001 | 2.66±0.94 | 2.78±0.98 | 0.290 |
*, continuous variables with normal distribution are presented as mean ± SD unless otherwise noted. PI, pulse index; MGF, mean graft flow; H0, the amplitude of the main wave; H1, the amplitude of the first harmonic; P, the frequency of the first harmonic; MACCEs, major adverse cardiac and cerebrovascular events.