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ICU and Critical Care

Logistic Organ Dysfunction System (LODS) Mortality calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Glasgow Coma Scale (points)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Heart rate (/min)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Systolic blood pressure (mm Hg)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Serum urea (mmol/L)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Serum creatinine (µmol/L)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Urine output (L/day)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Ventilation status and PaO₂/FiO₂ ratio (mm Hg)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

WBC (×10⁹/L)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Platelet count (×10⁹/L)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Total bilirubin (µmol/L)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Prothrombin time (% of control or seconds over control)

Choose the worst value during the first 24 hours. Within each organ, the calculator uses only the highest variable subscore.

Result

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Clinical inputs

  • Glasgow Coma Scale (points)
  • Heart rate (/min)
  • Systolic blood pressure (mm Hg)
  • Serum urea (mmol/L)
  • Serum creatinine (µmol/L)
  • Urine output (L/day)
  • Ventilation status and PaO₂/FiO₂ ratio (mm Hg)
  • WBC (×10⁹/L)
  • Platelet count (×10⁹/L)
  • Total bilirubin (µmol/L)
  • Prothrombin time (% of control or seconds over control)

Primary source

Le Gall JR et al. The Logistic Organ Dysfunction system. A new way to assess organ dysfunction in the intensive care unit. JAMA. DOI: 10.1001/jama.1996.03540100046027. PMID: 8769590 (1996)

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