Scale Analysis

The Karnofsky Performance Scale (KPS-11) was developed in 1949 by Karnofsky and Burchenal. The KPS-11 is evaluated by healthcare professionals and focuses primarily on determining physical functioning.

Purpose

The main purpose of this scale is to assess physical function without addressing the patient’s psychosocial status.

Question Calibration

The KPS-11 consists of an 11-point scoring scale ranging from 100 (normal functioning) to 0 (dead), based on 10 defined levels of physical ability. These 11 levels must be used exactly as defined, meaning no intermediate estimates are allowed between the set points.

Statistical Analysis

The score on the KPS-11 ranges from 0% to 100%, depending on the individual’s level of physical function and capability. A score of 100% represents full physical functioning with no limitations or signs of illness, while 0% indicates death. Lower scores reflect poorer quality of life, whereas higher scores indicate better quality of life. The final score is determined by the physician. The index provides a general estimate of a patient’s quality of life.

Validity and Reliability

The KPS-11 has been considered a reliable tool for assessing patient status. Regarding the reliability of its scores, Cronbach’s alpha was found to be 0.720, indicating acceptable internal consistency.

References

Karnofsky, D. A., & Burchenal, J. H. (1949). In: Evaluation of Chemotherapeutic Agents. MacLeod, C. M. (Ed.). New York: Columbia University Press. The clinical evaluation of chemotherapeutic agents in cancer, pp. 191–205.

For the development and analysis of research data based on this scale, or for more information, please contact the DatAnalysis team.

Tags: Karnofsky Performance Scale, Karnofsky Index, KPI, Physical Function