Correlation of heuristics with diagnostic error:
Representativeness: of the 33 errors detected, 17 of them showed a
concordance between the FDI and the CD. In a little more than half of
the diagnostic errors (51.5%) a possible use of the Representativeness
heuristic could be identified. However, the statistics calculated do not
show a statistically significant correlation between both variables
Availability: in 25 of the 33 diagnostic errors there is a concordance
between the confirmation diagnosis and one of the differential diagnoses
(DD). This represents 75.8%. However, statistical tests show no
statistically significant correlation between this agreement and
diagnostic error, even though, with an odds ratio of 1.73, the
prevalence indicates a high probability of diagnostic error when DD=CD,
Overconfidence: In 22 of the 33 diagnostic errors they (66.7%) showed
above-average confidence in the diagnosis. In terms of prevalence, with
an Odds Ratio of 1.44 we obtain that the frequency of making diagnostic
errors by our doctors is 44% more frequent when they show an excess of
confidence. However, as in the case of the previous heuristics, the
correlation is not statistically significant.