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Table 2 Comparison of various MR protocols in terms of diagnostic accuracies regarding involvement anterior to rectum.

From: The importance of rectal cancer MRI protocols on iInterpretation accuracy

  Compliant and
combination
protocol (D and C)
Noncompliant protocol (N)
Imaging accuracies   
True positive 6 2
True negative 16 3
False positive 1 6
False negative 1 2
Sensitivity (%) (95% CI) 85.7 (42–99) 50.0 (6–93)
Specificity (%) (95% CI) 94.1 (71–99) 33.3 (7–70)
Positive Predictive Value (%) (95% CI) 85.7 (42–99) 25.0 (3–65)
Negative Predictive Value (%) (95% CI) 94.1 (71–99) 60.0 (14–94)