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. 2023 Dec 18;32(4):e2023128. doi: 10.1590/S2237-96222023000400003.en

Figure 4. Survival tree of individuals studied, Brazil, 2021-2022.

Figure 4

1,14,18) Ventilação mecânica: respiratory support (not performed; noninvasive; invasive); 2,7,12,23,27) Faixa etária: age group (age on last birthday: 20-39; 40-59; 60-79; 80 or over); 3,13,20,24) Esquema vacinal: vaccination schedule [not immunized (not vaccinated or with an incomplete vaccination schedule); two doses; and booster dose]; 5) UTI: hospitalized in an intensive care unit [ICU, (yes; no)]; 6) Fator de risco: presence of risk factors/comorbidities (none; one or more). Notes: The squares represent the terminal nodes; each one contains the number of cases in that node (n) and the survival curve, estimated by the Kaplan-Meier method. The circles represent the internal nodes (intermediate or decision-making), contemplating the decisionmaking explanatory variable that will lead to a new split of the tree. Vaccination schedule: “no” for not immunized; “two” for two doses; and “boost” for booster dose.