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Table 3 Positive and negative likelihood ratios for predicting death or more than 14 days of ventilator dependency

From: Prediction of death and prolonged mechanical ventilation in acute lung injury

Patient population Diagnostic modality Statistic Estimate (95% CI)
VENTILA Model (≤ 3.0) LR+ 2.52 (1.57 to 4.07)
   LR- 0.56 (0.46 to 0.69)
  Model (≤ 3.5) LR+ 3.53 (1.72 to 7.24)
   LR- 0.68 (0.59 to 0.79)
  Oxygenation index (≤ 15) LR+ 1.98 (1.22 to 3.21)
   LR- 0.72 (0.6 to 0.86)
  PaO2/FiO2 (≤ 150) LR+ 1.77 (1.2 to 2.62)
   LR- 0.70 (0.58 to 0.85)
ARDS-net Model (≤ 3) LR+ 3.15 (2.38 to 4.19)
   LR- 0.40 (0.33 to 0.48)
  Model (≤ 3.5) LR+ 6.86 (4.1 to 11.47)
   LR- 0.51 (0.46 to 0.58)
  Oxygenation index (≤ 15) LR+ 2.18 (1.71 to 2.77)
   LR- 0.52 (0.44 to 0.62)
  PaO2/FiO2 (≤ 150) LR+ 1.98 (1.6 to 2.45)
   LR- 0.57 (0.49 to 0.66)
KCLIP Model (≤ 3) LR+ 1.56 (1.3 to 1.87)
   LR- 0.45 (0.34 to 0.6)
  Model (≤ 3.5) LR+ 1.83 (1.42 to 2.37)
   LR- 0.58 (0.47 to 0.71)
  Oxygenation index (≤ 15) LR+ 1.75 (1.33 to 2.32)
   LR- 0.67 (0.56 to 0.8)
  PaO2/FiO2 (≤ 150) LR+ 2.22 (1.69 to 2.92)
   LR- 0.62 (0.54 to 0.72)
  1. CI, confidence interval; FiO2, fractional inspired oxygen; LR+, positive likelihood ratios; LR-, negative likelihood ratios; PaO2, arterial oxygen tension.