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Table 2 Diagnostic accuracy of CTU for the detection of bladder cancer from both reviewers and their consensus

From: Computed tomography urography with corticomedullary phase can exclude urinary bladder cancer with high accuracy

 

Consensus

Reviewer 1

Reviewer 2

Cancer

Control

Cancer

Control

Cancer

Control

Positive, n

173

1

170

1

154

0

Indeterminate, n

19

27

20

27

33

28

Negative, n

15

62

17

62

20

62

FNR

0.07 (0.04–0.12)

 

0.08 (0.05–0.13)

 

0.10 (0.06–0.15)

 

FPR

0.01 (0.00–0.07)

 

0.01 (0.00–0.07)

 

0.00 (0.00–0.05)

 

NPV*

0.99 (0.92–1.00)

 

0.98 (0.92–1.00)

 

0.98 (0.92–1.00)

 

PPV*

0.91 (0.86–0.95)

 

0.91 (0.86–0.95)

 

1.00 (0.97–1.00)

 
  1. Confidence intervals (95%) in parentheses
  2. CTU: Computed tomography-urography; FNR: False negative rate; FPR: False positive rate; PPV: Positive predictive value; NPV: Negative predictive value
  3. *Values were calculated for the entire cohort of 2195 patients with a cancer prevalence of 12% and after matched exclusions