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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.