Estudios originales
Published on 26 de febrero de 2026 | http://doi.org/10.5867/medwave.2026.01.3162
Contextual factors and use of heuristics in the care of critically ill patients by intensivists during the COVID-19 pandemic: a quasi-experimental vignette study in Chile
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Example of a contingency table: concordant and discordant events.
| Non heuristic (0) | Heuristic (1) | Total | ||
| Non heuristic (0) | a = 16 | b = 5 | 21 | |
| Heuristic (1) | c = 0 | d = 8 | 8 | |
| Total | 16 | 13 | 29 | |
Notes: This Table 2 a practical example of the McNemar test.
Source: Prepared by the authors.