Performance status

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Performance status

In medicine (oncology and other fields), performance status is an attempt to quantify cancer patients' general well-being and activities of daily life. This measure is used to determine whether they can receive chemotherapy, whether dose adjustment is necessary, and as a measure for the required intensity of palliative care. It is also used in oncological randomized controlled trials as a measure of quality of life.

Contents

Scoring systems

There are various scoring systems. The most generally used are the Karnofsky score and the Zubrod score, the latter being used in publications by the WHO. For children, the Lansky score is used. Another common system is the Eastern Cooperative Oncology Group (ECOG) system. Parallel scoring systems include the Global Assessment of Functioning (GAF) score, which has been incorporated as the fifth axis of the Diagnostic and Statistical Manual (DSM) of psychiatry.

Karnofsky scoring

The Karnofsky Performance Score (KPS) ranking runs from 100 to 0, where 100 is "perfect" health and 0 is death. Practitioners occasionally assign performance scores in between standard intervals of 10. This scoring system is named after Dr. David A. Karnofsky, who described the scale with Dr. Walter H. Abelmann, Dr. Lloyd F. Craver, and Dr. Joseph H. Burchenal in 1948. [1] The primary purpose of its development was to allow physicians to evaluate a patient's ability to survive chemotherapy for cancer.

ECOG/WHO/Zubrod score

The Eastern Cooperative Oncology Group (ECOG) score (published by Oken et al. in 1982), also called the WHO or Zubrod score (after C. Gordon Zubrod), runs from 0 to 5, with 0 denoting perfect health and 5 death: [2] Its advantage over the Karnofsky scale lies in its simplicity.

Lansky score

Children, who might have more trouble expressing their experienced quality of life, require a somewhat more observational scoring system suggested and validated by Lansky et al. in 1987: [3]

Comparison

A translation between the Zubrod and Karnofsky scales that works especially well for healthy patients has been validated in a large sample of lung cancer patients: [4]

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References

  1. Karnofsky DA, Abelmann WH, Craver LF, Burchenal JH. The Use of the Nitrogen Mustards in the Palliative Treatment of Carcinoma – with Particular Reference to Bronchogenic Carcinoma. Cancer. 1948;1(4):634-56.
  2. Oken MM, Creech RH, Tormey DC, et al. (1982). "Toxicity and response criteria of the Eastern Cooperative Oncology Group". Am. J. Clin. Oncol. 5 (6): 649–55. doi:10.1097/00000421-198212000-00014. PMID   7165009. S2CID   2261448.
  3. Lansky SB, List MA, Lansky LL, Ritter-Sterr C, Miller DR (1987). "The measurement of performance in childhood cancer patients". Cancer. 60 (7): 1651–6. doi: 10.1002/1097-0142(19871001)60:7<1651::AID-CNCR2820600738>3.0.CO;2-J . PMID   3621134.
  4. Buccheri G, Ferrigno D, Tamburini M. Karnofsky and ECOG performance status scoring in lung cancer: a prospective, longitudinal study of 536 patients from a single institution. Eur J Cancer. 1996 Jun;32A(7):1135-41.