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Table 2 Comparison of sensitivity as well as accuracy, specificity, PPV,NPV of preoperative T staging for lower rectal cancer using CTC with MPR and MRI

From: Preoperative T staging using CT colonography with multiplanar reconstruction for very low rectal cancer

CTC with MPR (N=45)   MRI (n=34)
  ctT1 ctT2 ctT3 ctT4 n sensitivity   mrT1 mrT2 mrT3 mrT4 n sensitivity
pT1 5   1   6 83% pT1 0 1 1   2 0%
pT2 2 14 1   17 82% pT2   8 7   15 53%
pT3    21   21 100% pT3   1 15   16 94%
pT4     1 1 100% pT4     1 1 100%
  7 14 23 1 45 91%   0 10 23 1 34 71%
  pT1 pT2 pT3
CTC (n=6) MRI (n=2) CTC (n=17) MRI (n=15) CTC (n=21) MRI (n=16)
Accuracy 93% (42/45) 94% (32/34) 93% (42/45) 74% (25/34) 96% (43/45) 74% (25/34)
Sensitivity 83% (5/6) 0% (0/2) 82% (14/17) 53% (8/15) 100% (21/21) 94% (15/16)
Specificity 95% (37/39) 100% (32/32) 100% (28/28) 89% (17/19) 92% (22/24) 56% (10/18)
PPV 71% (5/7) - (0/0) 100% (14/14) 80% (8/10) 91% (21/23) 65% (15/23)
NPV 97% (37/38) 94% (32/34) 90% (28/31) 71% (17/24) 100% (22/22) 91% (10/11)