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Pulmonology

du Bois Score for IPF Mortality calculator

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

Clinical inputs

years

Allowed range: 40–90 years

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%

Allowed range: 20–120 %

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%

Allowed range: -30–20 %

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Result

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Clinical inputs

  • Age (years)Accepted range: 40 to 90
  • Respiratory hospitalization (prior 24 weeks)
  • FVC (% predicted)Accepted range: 20 to 120
  • 24-week change in FVC (% predicted)Accepted range: -30 to 20

Primary source

du Bois RM et al. Ascertainment of individual risk of mortality for patients with idiopathic pulmonary fibrosis. Am J Respir Crit Care Med. DOI: 10.1164/rccm.201011-1790OC. PMID: 21616999. Scope: points from age, recent respiratory hospitalization, baseline FVC % predicted, and 24-week FVC change to estimate 1-year mortality risk. Points: age <60 = 0, 60–69 = 4, ≥70 = 8; respiratory hospitalization in the previous 24 weeks = 14; FVC ≥80% = 0, 66–79% = 8, 51–65% = 13, ≤50% = 18 predicted; 24-week FVC change > −5 = 0, −5 to −9.9 = 10, ≤ −10 percentage points = 21. Total 0–61; the paper converts the total to 1-year mortality with its own table, which is not reproduced here. (2011)

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