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Table 5 The commonly used incorrect Bayesian approaches*

From: Explaining computation of predictive values: 2 × 2 table versus frequency tree. A randomized controlled trial [ISRCTN74278823]

  Training session Follow-up examination
  total Frequency
tree
2 × 2
table
total Frequency
tree
2 × 2
table
correct positive rate/ false positive rate 41 26 (63) 15 (37) 16 11 (69) 5 (31)
disease yes / all positives 14 7 (50) 7 (50) 37 20 (54) 17 (46)
correct positives / disease yes 11 6 (55) 5 (45) 22 11 (50) 11 (50)
all positives / total 4 4 (100) 0 (0) 14 6 (43) 8 (57)
all positives / 100 0 0 (0) 0 (0) 6 6 (100) 0 (0)
disease yes / correct positives 4 1 (25) 3 (75) 1 1 (100) 0 (0)
all positives/ correct positives 4 0 (0) 4 (100) 5 5 (100) 0 (0)
not identified 23 13 (57) 10 (43) 29 14 (48) 15 (52)
total 101 57 (56) 44 (44) 130 74 (57) 56 (43)
  1. * Values are numbers (percentages) of incorrect Bayesian approaches.