Table 2.
Tumor sizes and correlation coefficients in 80 invasive cancers
| Pathology | Manual measurement on MRI a | CAD b with 30% threshold | CAD with 50% threshold | CAD with 100% threshold | |
|---|---|---|---|---|---|
| Mean tumor size (mm) (p value*) | 22.47 ± 13.79 | 22.77 ± 12.69 (0.726) | 22.35 ± 13.96 (0.887) | 19.15 ± 13.75 (< 0.001) | 9.91 ± 11.55 (< 0.001) |
| Median tumor size (mm) | 20.00 | 20.00 | 18.00 | 15.00 | 6.50 |
| Size range (mm) | 5–85 | 6–69 | 5–68 | 0–66 | 0–63 |
| Correlation coefficient (p value†) | 0.778 (< 0.001) | 0.808 (< 0.001) | 0.729 (< 0.001) | 0.386 (< 0.001) | |
| Test of difference between two independent correlations (p value††) | (0.921) | (0.080) | (< 0.001) |
* A paired t test was used to compare the mean difference in tumor size measurement with MRI or CAD and pathological tumor size
† Spearman correlation analysis was used to calculate the correlation coefficient between tumor size measurements with MRI
or CAD and pathological tumor size
†† Test of difference between two independent correlations was used to test the difference between MRI and CAD with the 30% threshold or between MRI and CAD with the 50% threshold or between MRI and CAD with the 100% threshold
aMRI magnetic resonance imaging, bCAD computer-aided detection