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. 2004 Aug 10;4:13. doi: 10.1186/1472-6920-4-13

Table 3.

Numbers of correct solutions of positive predictive values*

Category Training session Follow-up examination
Frequency tree
(n = 94)
2 × 2 table
(n = 90)
Frequency tree
(n = 74)
2 × 2 table
(n = 75)

0–1
(0–1 answer correct)
19(20) 18(20) 53 (72) 50 (67)
2–3
(2–3 answers correct)
20 (21) 20 (22) 2 (3) 5 (7)
4–5
(4–5 answers correct)
55 (59) 52(58) 19 (26) 20(27)

* Values are numbers (percentages) of participants