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Table 4 Positive predictive value (PPV), sensitivity, and specificity of preoperative CT in identifying the pathologic stage in patients with locally advanced rectal cancer

From: Restaging locally advanced rectal cancer by different imaging modalities after preoperative chemoradiation: a comparative study

 

PPV

Sensitivity

Specificity

T stage

   

  T0

36 (9/25)

60 (9/15)

80 (62/78)

  T1

-

-

-

  T2

25 (8/32)

33 (8/24)

65 (45/69)

  T3

72 (23/32)

47 (23/49)

80 (35/44)

  T4

-

-

-

N stage

27 (3/11)

4 (3/74)

50(8/16)

TNM stage

   

  0

35 (9/26)

60 (9/15)

79 (63/80)

  I

34 (11/32)

39 (11/28)

69 (46/67)

  II

50 (11/22)

30 (11/37)

81 (47/58)

  III

46 (6/13)

50 (6/12)

92 (76/83)

  IV

-

-

-

  1. Note: Data are expressed in percentage (number of patients out of relevant total).
  2. Sensitivity and specificity of each T and TNM stage were calculated as the relevant T stage versus all others.
  3. (−) refers to groups with fewer than 5 patients.
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Radiation Oncology

ISSN: 1748-717X

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