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Generalised pustular psoriasis Area and Severity Index (GPPASI)

The GPPASI combines the scores for each body region (head, trunk, upper and lower limbs) for erythema, pustules, and scaling (desquamation) with the percent involvement of these areas.

Generalized Pustular Psoriasis Area and Severity Index (GPPASI)
  • The GPPASI was developed based on the Psoriasis Area and Severity Index (PASI), a measure used to assess the area and severity of psoriatic lesions in patients with psoriasis1
  • The induration component was replaced with the pustules2
  • GPPASI provides a numeric scoring for a patient's overall GPP disease state, ranging from 0 to 72
Calculation of total GPPASI score3

[(E+P+D)x Area]  x0.1 (head)]+ [(E+P+D)x Area]  x0.1 (upper limb)] +[(E+P+D)x Area]  x0.1 (trunk)] [(E+P+D)x Area]  x0.1 (lower limb)]

Disclaimer

Calculations must be re-checked and should not be used alone to guide patient care, nor should they substitute for clinical judgment. Please note that we do not collect any personal data from this page.

References

  1. Fredriksson T, et al. Dermatologica. 1978:157:238-244.

  2. Bachelez H, et al. New Enal J Med. 2019:981-983.

  3. Choon SE, et al. BMJ Open. 2021:11:043666.

Document ID : PC-SA-102653