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Haematology

ISTH-SSC Bleeding Assessment Tool calculator

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

Clinical inputs

Patient group

Abnormal cutoffs differ by group: 4 or more in adult men, 6 or more in adult women, 3 or more in children.

Epistaxis
Cutaneous bleeding (bruising)
Bleeding from minor wounds
Oral cavity bleeding
Gastrointestinal bleeding
Haematuria
Bleeding after tooth extraction
Bleeding with surgery
Menorrhagia

Score 0 when there is no or trivial bleeding or the item does not apply.

Post-partum haemorrhage

Score 0 for men and for women with no deliveries.

Muscle haematomas
Haemarthrosis
Central nervous system bleeding

This item scores only 0, 3 or 4.

Other bleeding

Result

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Clinical inputs

  • Patient group
  • Epistaxis
  • Cutaneous bleeding (bruising)
  • Bleeding from minor wounds
  • Oral cavity bleeding
  • Gastrointestinal bleeding
  • Haematuria
  • Bleeding after tooth extraction
  • Bleeding with surgery
  • Menorrhagia
  • Post-partum haemorrhage
  • Muscle haematomas
  • Haemarthrosis
  • Central nervous system bleeding
  • Other bleeding

Primary source

Rodeghiero F, Tosetto A, Abshire T, Arnold DM, Coller B, James P, et al. ISTH/SSC bleeding assessment tool: a standardized questionnaire and a proposal for a new bleeding score for inherited bleeding disorders. J Thromb Haemost. 2010;8(9):2063-2065. DOI: 10.1111/j.1538-7836.2010.03975.x. PMID: 20626619. Item wording taken from the original English version reprinted as Table 1 in Carneiro-Leão D, et al. Acta Med Port. 2025;38(2):75-78. Fourteen domains (epistaxis, cutaneous, minor wounds, oral cavity, gastrointestinal, haematuria, tooth extraction, surgery, menorrhagia, post-partum haemorrhage, muscle haematomas, haemarthrosis, CNS, other) each score 0 to 4; CNS bleeding scores only 0, 3 (subdural) or 4 (intracerebral). The bleeding score is the sum. Abnormal cutoffs from Elbatarny M, et al. Normal range of bleeding scores for the ISTH-BAT: adult and pediatric data from the merging project. Haemophilia. 2014;20(6):831-835. DOI: 10.1111/hae.12503. PMID: 25196510: normal range 0-3 in adult men, 0-5 in adult women and 0-2 in children, so a score of 4 or more, 6 or more and 3 or more respectively is abnormal. (2010)

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