Table 3 CT-predicted T stage for each observer vs histology T stage

From: Preoperative computed tomography staging of nonmetastatic colon cancer predicts outcome: implications for clinical trials

 

Observer A CT-predicted T-stage

Observer B CT-predicted T stage

Histology

T1/T2

T3good

T3bad

T4

Tx

Total

T1/T2

T3good

T3bad

T4

Tx

Total

T1

4

2

  

1

7

5

   

2

7

T2

4

6

2

1

 

13

6

1

6

  

13

T3

7

26

18

15

1

67

12

14

26

9

6

67

T4

1

4

10

24

 

39

2

4

7

25

 

38

Total

16

38

30

40

2

126

25

19

39

34

8

125

  1. Observer A:
  2. Stage-for-stage accuracy=60.3%.
  3. Extramural invasion (stage T3/T4):
  4. Overall accuracy=83.3% (sensitivity=92.4%; specificity=42.1%).
  5. Positive predictive value=89.8%; negative predictive value=50.0%.
  6. Observer B:
  7. Stage-for-stage accuracy=60.8%.
  8. Extramural invasion (stage t3/t4):
  9. Overall accuracy=76.2% (sensitivity=85.9%; specificity=61.1%).
  10. Positive predictive value=92.4%; negative predictive value=44.0%.
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