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Updated: Jan 29, 2026

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Objective assessment of WHO/ECOG performance status.

Miha Sok1,2, Miha Zavrl3, Boris Greif3

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A new objective performance meter accurately assesses patient performance, unlike subjective methods. This tool could improve healthcare decisions by providing a more reliable measure of patient status.

Keywords:
ECOG scoreObjective scorePerformance meterPerformance status

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Area of Science:

  • Gerontology
  • Medical Devices
  • Clinical Assessment

Background:

  • Performance status is crucial for quality of life, treatment selection, and prognosis in patients.
  • Current performance status scoring systems rely on subjective assessments.
  • Objective assessment of performance status, particularly for ECOG/WHO grades 2 and 3, is needed.

Purpose of the Study:

  • To develop and test a novel objective method for assessing patient performance status.
  • To evaluate the reliability of a new performance meter compared to subjective assessments.

Main Methods:

  • A performance meter was constructed using an adapted USB data logger with a mercury tilt switch.
  • A feasibility study was conducted on 33 retirement home residents.
  • Objective assessments were compared with self-estimates and nursing staff evaluations.

Main Results:

  • The performance meter identified 12% of residents as PS ≥ 3.
  • Subjective assessments by patients and nursing staff identified 24% and 21% respectively as ECOG score ≥ 3.
  • Objective measurement revealed a better performance score in 12% of patients compared to subjective methods.

Conclusions:

  • Subjective performance status scoring often underestimates patient performance.
  • The developed performance meter offers a more objective and potentially more accurate assessment.
  • This objective tool could aid healthcare professionals in making informed care decisions.