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Table 4 Tumor sizes and correlation coefficients in 50 ductal carcinoma in situ

From: Preoperative tumor size measurement in breast cancer patients: which threshold is appropriate on computer-aided detection for breast MRI?

 

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*)

24.96 ± 17.97

25.80 ± 15.50 (0.678)

27.06 ± 17.00 (0.297)

21.54 ± 17.45 (0.118)

8.28 ± 12.29 (<  0.001)

Median tumor size (mm)

21.00

23.50

23.00

17.00

4.00

Size range (mm)

4–90

4–78

6–84

0–81

0–60

Correlation coefficient (p value†)

 

0.620 (<  0.001)

0.659 (<  0.001)

0.600 (<  0.001)

0.370 (0.002)

Test of difference between two independent correlations (p value††)

  

(0.810)

(0.890)

(0.120)

  1. * A paired t test was used to compare the mean difference in tumor size measurement with MRI or CAD and pathological tumor size
  2. † Spearman correlation analysis was used to calculate the correlation coefficient between tumor size measurements with MRI
  3. or CAD and pathological tumor size
  4. †† 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
  5. aMRI magnetic resonance imaging, bCAD computer-aided detection