Table 2.
Comparison of quantitative MRI parameters between Ki-67 LIlow and Ki-67 LIhigh groups in the training set.
| Low Ki-67 LI (n = 35) |
High Ki-67 LI (n = 89) |
p value | ICC | |
|---|---|---|---|---|
| Tumor size (cm) | 3.15 [2.26, 4.36] | 5.24 [2.62, 5.51] | 0.002* | 0.88 |
| TLRAP | 1.33 ± 0.25 | 1.38 ± 0.42 | 0.667 | 0.82 |
| TEIAP | 1.63 ± 0.31 | 1.73 ± 0.42 | 0.632 | 0.85 |
| RTEAP | 0.72 ± 0.41 | 0.80 ± 0.43 | 0.914 | 0.76 |
| RERAP | 0.84 [0.35, 1.05] | 0.72 [0.42, 1.02] | 0.445 | 0.80 |
| TLRPVP | 0.78 [0.83, 1.24] | 0.84 [0.71, 1.13] | 0.265 | 0.84 |
| TEIPVP | 1.23 [1.03, 1.42] | 1.13 [0.95, 1.40] | 0.232 | 0.77 |
| RTEPVP | 0.85 [0.52, 1.14] | 0.70 [0.33, 1.11] | 0.244 | 0.84 |
| RERPVP | 1.42 [0.89, 2.46] | 1.04 [0.64, 1.84] | 0.065 | 0.76 |
| TLRTP | 0.89 [0.78, 1.07] | 0.78 [0.65, 0.95] | 0.025* | 0.83 |
| TEITP | 1.12 ± 0.23 | 1.17 ± 0.34 | 0.558 | 0.82 |
| RTETP | 0.74 ± 0.31 | 0.72 ± 0.36 | 0.830 | 0.80 |
| RERTP | 1.11 [0.75, 1.43] | 0.95 [0.62, 1.23] | 0.065 | 0.79 |
| TLRHBP | 0.67 ± 0.14 | 0.53 ± 0.16 | 0.004* | 0.86 |
| TEIHBP | 0.78 ± 0.12 | 0.65 ± 0.15 | 0.026* | 0.85 |
| RTEHBP | 0.37 [0.23, 0.54] | 0.26 [0.14, 0.58] | 0.314 | 0.87 |
| RERHBP | 0.45 [0.26, 0.68] | 0.37 [0.24, 0.56] | 0.058 | 0.81 |
| T1Pre (msec) | 1243.07 ± 257.41 | 1385.36 ± 239.28 | 0.047* | 0.83 |
| T1HBP (msec) | 744.17 ± 162.74 | 845.21 ± 156.42 | 0.007* | 0.82 |
| ΔT1% | 0.41 ± 0.14 | 0.38 ± 0.13 | 0.247 | 0.78 |
*p<0.05. Continuous variables are presented as median [inter-quartile range, IQR] or mean ± standard deviation. Categorial variables are presented as number (percentage).
AP, arterial phase; PVP, portal venous phase; TP, transition phase; HBP, hepatobiliary Phase; TLR, tumor to liver contrast ratio; TEI, tumor enhancement index; RTE, relative tumor enhancement; RER, relative enhancement ratio; Pre, pre-enhancement; T1Pre: pre-contrast T1 relaxation time; T1HBP, T1 relaxation time in the hepatobiliary phase; ΔT1%, reduction rate of T1 relaxation time; ICC, intraclass correlation coefficient.