Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like Karnofsky Performance Status (KPS) frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the Karnofsky Performance Status (KPS)?
The Karnofsky Performance Status (KPS) is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in oncology practice. The Karnofsky Performance Status (KPS) scale is an assessment tool for functional impairment. It is widely used to compare effectiveness of different therapies and to assess the prognosis in individual patients. Clinical scoring tools like Karnofsky Performance Status (KPS) are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).
💡Clinical Pearls & Diagnostic Utility
Similar to the ECOG scale, the KPS is used to track disease progression, determine whether a patient can tolerate therapies, and as a criterion for clinical trial enrollment.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate Karnofsky Performance Status (KPS):
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 40 | Unable to Care for Self | red |
| 50 – 70 | Unable to Work | yellow |
| ≥ 80 | Able to Work | green |
When to Exercise Caution
Can be subjective. KPS and ECOG are often used interchangeably (e.g. KPS 100 = ECOG 0, KPS 80-90 = ECOG 1, KPS 60-70 = ECOG 2).
Clinical Review Board
Dr. Muhammad Nouman, MBBS
Capital Medical University | PMDC Reg No: 117744-P
Clinical Audit Status
✓ Verified for 2026 Guidelines
Last updated: 2026-08-07
Peer-Reviewed Medical Literature
- •Karnofsky DA, Burchenal JH. The Clinical Evaluation of Chemotherapeutic Agents in Cancer. In: MacLeod CM (Ed), Evaluation of Chemotherapeutic Agents. Columbia Univ Press, 1949: 196.
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