Table 3.
Regression analysis results of establishing CEUS model based on CEUS features to predict the BCR, ∗P < 0.05.
| CEUS model | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| P | Hazard ratio | P | Hazard ratio | |
| PI (dB) | 0.025∗ | 0.794 (0.648-0.971) | 0.083 | 0.827 (0.667-1.025) |
| Σ | 0.395 | 1.441 (0.622-3.336) | ||
| γ | 0.533 | 1.308 (0.562-3.042) | ||
| TTP | 0.044∗ | 1.010 (1.000-1.019) | 0.074 | 1.009 (0.999-1.020) |
| AT | 0.028∗ | 1.165 (1.017-1.334) | 0.079 | 1.144 (0.984-1.329) |
| AUC | 0.753 | 0.877 (0.386-1.989) | ||
| Enhanced level | 0.872 | 0.934 (0.408-2.137) | ||
| Enhanced uniformity | 0.781 | 0.891 (0.394-2.013) | ||
| Elastography grade | 0.013∗ | 2.515 (1.218-5.191) | 0.019∗ | 2.581 (1.771-5.692) |
Notes: PI: the peak intensity; Σ: ascending branch slope; γ: descending branch slope; TTP: time to peak; AT: arrival time.