Fig. 3

Kaplan‒Meier survival analysis for PMV risk factors. A In estimation for prolonged mechanical ventilation (PMV) occurrence in influenza-induced ARDS, stratification was conducted based on BMI > 25 (kg/m²). Individuals with BMI > 25 (kg/m²) exhibited a significantly higher prevalence of PMV. B In estimation of prolonged mechanical ventilation (PMV) occurrence in influenza-induced ARDS, stratification was performed based on the presence or absence of combined bacterial pneumonia within 21 days prior to ventilator support. Individuals with combined bacterial pneumonia showed a significantly higher incidence of PMV. C In estimation for prolonged mechanical ventilation (PMV) in influenza-induced ARDS, stratification was performed based on the presence or absence of ECMO utilization. Individuals receiving ECMO support demonstrated a significantly higher incidence of PMV. D In estimation for prolonged mechanical ventilation (PMV) occurrence in influenza-induced ARDS, stratification was performed based on the duration of neuromuscular blockade agent (NMBA) use exceeding 48 h. Individuals with NMBA use exceeding 48 h showed a significantly higher incidence of PMV