Table 4.
The correlation between the heterogeneity rankings computed via various statistics and that done independently by the veteran oncologist was quantified via the Spearman rank test
| Ranking statistic | ||||||||
|---|---|---|---|---|---|---|---|---|
|
Set |
Images |
Area(px) |
ζ |
Variance |
Entropy |
Energy |
Contrast |
Homogeneity |
| A |
7 |
0–30 |
0.015 |
0.305 |
0.361 |
0.361 |
0.164 |
0.164 |
| B |
7 |
30–50 |
0.100 |
0.050 |
0.333 |
0.333 |
0.015 |
0.305 |
| C |
7 |
50–75 |
0.003 |
0.228 |
0.305 |
0.389 |
0.005 |
0.185 |
| D |
6 |
50–75 |
0.003 |
0.250 |
0.220 |
0.288 |
0.190 |
0.160 |
| E |
8 |
75–100 |
0.003 |
0.327 |
0.481 |
0.134 |
0.090 |
0.167 |
| F |
6 |
100-125 |
0.083 |
0.327 |
0.250 |
0.220 |
0.481 |
0.220 |
| G |
6 |
125–300 |
0.050 |
0.288 |
0.160 |
0.250 |
0.083 |
0.083 |
| Mean | 0.04±0.02 | 0.25±0.04 | 0.30±0.04 | 0.28±0.03 | 0.15±0.06 | 0.18±0.03 | ||
The p-values given in columns 4–9 represent the likelihood that observed correlations are due entirely to random chance.