Fig. 2From: Flu-IV score: a predictive tool for assessing the risk of invasive mechanical ventilation in patients with influenza-related pneumoniaRisk factors associated with invasive mechanical ventilation in Flu-p patients. A multivariate logistic regression model identified the following factors as independent predictors of a higher risk of requiring IMV in Flu-p patients: early NAI use, lymphocytes < 0.8 × 109/L, multilobar infiltrates, age ≥ 65 years old, systemic corticosteroid administration, PaO2/FiO2 < 300 mmHg, respiratory rate ≥ 30 breaths/min, and arterial PH < 7.35Back to article page