Table 2 Correlations between the tumor ADC values and aggressive characteristics.

From: Readout-segmented echo-planar diffusion-weighted MR for the evaluation of aggressive characteristics of rectal cancer

Parameters

No. of patients (n)

Tumor ADC values (×10−3 mm2/s)

Spearman’s coefficient

Differentiation grade

Poor

11 (9.6%)

0.89 ± 0.12

0.59**

Moderate

92 (80.0%)

1.13 ± 0.25*

 

Good

12 (10.4%)

1.31 ± 0.19*

 

Clinical T stage

T1

9 (7.8%)

1.06 ± 0.08

−0.08

T2

40 (34.8%)

1.11 ± 0.20

 

T3

53 (46.1%)

1.03 ± 0.18

 

T4

13 (11.3%)

1.15 ± 0.18

 

Plasma CEA level

<5 ng/ml

76 (66.1%)

1.10 ± 0.25

−0.07

≥5 ng/ml

39 (33.9%)

1.07 ± 0.19

 
  1. Notes: Values are presented as the mean ± SD. ADC, apparent diffusion coefficient; CEA, carcinoembryonic antigen. *P < 0.001 vs. poor differentiation grade group. **P < 0.001.
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