Table 4.
Comparison of different parameters of the whole-volume ADC histogram in the breast cancers with low and high Ki-67 levels.
| Variable | Low Ki-67 levels (n=26) | High Ki-67 levels (n=88) | t value | P-value |
|---|---|---|---|---|
|
Mean ADC
(×10−6 mm2/s) |
1,176.95 ± 205.95 | 1,135.89 ± 216.44 | 0.86 | 0.392 |
| 10th percentile ADC (×10−6 mm2/s) | 814.12 ± 160.15 | 822.52 ± 189.76 | −0.21 | 0.838 |
| 25th percentile ADC (×10−6 mm2/s) | 965.08 ± 147.09 | 944.99 ± 196.47 | 0.48 | 0.631 |
| 50th percentile ADC (×10−6 mm2/s) | 1,153.65 ± 214.27 | 1,101.09 ± 216.97 | 1.09 | 0.279 |
| 75th percentile ADC (×10−6 mm2/s) | 1,371.69 ± 321.67 | 1,297.02 ± 251.16 | 1.25 | 0.215 |
| 90th percentile ADC (×10−6 mm2/s) | 1,580.19 ± 395.55 | 1,510.87 ± 281.51 | 1.00 | 0.320 |
| skewness | 0.29 ± 0.78 | 0.59 ± 0.55 | −2.21 | 0.029 |
| entropy | 6.41 ± 1.41 | 6.88 ± 1.38 | −1.51 | 0.134 |
| kurtosis | 1.52 ± 1.95 | 1.45 ± 1.64 | 0.183 | 0855 |