Figure 1.

Independent predictors of invasive mechanical ventilation in the maximum care population.

Numbers and percentages of patients with each risk factor who had the outcomes (risk factor present) and of patients without each risk factor with a favorable evolution (risk factor absent) are shown. The 95% confidence intervals (CIs) of the odds ratios have been adjusted for multiple testing. R² models = 0.51 for invasive mechanical ventilation. Maximum care population refers to patients suitable for intensive measures and ICU admission, if necessary. Independent predictors associated with the outcomes are shown in bold. *On admission. LDH, lactate dehydrogenase; prot., protein; BNP, brain natriuretic peptide. For the purpose of logistic regression, variables were categorized regarding their 75th percentiles within each subpopulation, to show the impact of severe extreme values on the outcomes, except for those in which severity is defined by the lowest levels, such as lymphocyte count, where the 25th percentiles were used. For the following variables, standard categorizations were followed: age ≥65 years, PaO₂:FiO₂ <300 mmHg.