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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Results of the McNemar test.
| 1 | A vs G | Time | Statu quo | Decision at 10 AM vs. 3 AM | 0.031 | 0.0625 | -(0.917,-) |
| 2 | I vs B | Age, wave | Decision: 54-year-old patient, first wave vs. 74-year-old patient, first wave | < 0.001 | 0.007 | 0.15 (0.017 to 0.680) | |
| F vs M | Decision: 54-year-old patient, last wave vs. 74-year-old patient, last wave | < 0.001 | 0.039 | 0.2 (0.021 to 0.939) | |||
| I vs F | Decision: 54-year-old patient, first wave vs. 54-year-old patient, last wave | 0.075 | 0.790 | 0.75 (0.214 to 2.464) | |||
| B vs M | Decision: 74-year-old patient, first wave vs. 74-year-old patient, last wave | 0.42 | 1.000 | 1 (0.134 to 7.466) | |||
| 4 | D vs N | Clinical intervention | Decision CT scan already ordered first wave vs CT scan not ordered first wave | < 0.001 | 0.03 (0.0008 to 0.201) | ||
| H vs K | Decision CT scan already ordered last wave vs CT scan not ordered last wave | < 0.001 | 0 (0 to 0.126) | ||||
| D vs H | Decision CT scan already ordered first wave vs CT scan already ordered last wave | 0.625 | 1.000 | 2 (0.104 to 117.994) | |||
| N vs K | Decision CT scan not ordered first wave vs CT scan not ordered last wave | 0.289 | 0.453 | 0.4 (0.038 to 2.443) | |||
| 3 | J vs P | Age, wave | Representativeness | Decision: 45-year-old patient, first wave vs. 81-year-old patient, first wave | 0.302 | 0.423 | 0.55 (0.146 to 1.846) |
| L vs C | Decision: 45-year-old patient, last wave vs. 81-year-old patient, last wave | 0.344 | 0.508 | 0.5 (0.081 to 2.341) | |||
| J vs L | Decision: 45-year-old patient, first wave vs. 45-year-old patient, last wave | 0.008 | 0.016 | 0 (0 to 0.69) | |||
| P vs C | Decision: 81-year-old patient, first wave vs. 81-year-old patient, last wave | 0.001 | 0.002 | 0 (0 to 0.446) | |||
| 5 | O vs E | Wave | Availability | Decision in first wave vs. decision in last wave | 0.012 | 0.021 | 0.11 (0.003 to 0.80) |
95% confidence interval. AM, before noon. PM, after noon. OR, odds ratio. CI 95%, vs, versus. CT, computed tomography.MN, McNemar test. Bi, Binomial test.
Notes: 1Discordant events in cell “c,” which are the denominator in the calculation of the OR, are equal to 0.
2The p-values in the column titled “Bi p-value” are the result of performing binomial contrasts in the terms described in the methodology.
Source: Prepared by the authors.