Performance status refers to an assessment of an individual’s functional well-being and ability to carry out daily activities. It is commonly used in the medical field, particularly in oncology, to gauge a patient’s overall health and their ability to tolerate medical treatments and interventions. Performance status is usually measured on a scale, with different levels representing varying degrees of functional impairment. One of the most widely used scales is the Karnofsky Performance Scale (KPS) and the Eastern Cooperative Oncology Group Performance Status (ECOG PS) scale.

Performance status is a crucial factor in treatment decision-making, as it helps in determining the appropriate level of medical intervention, the potential risks and benefits of treatments, and the overall prognosis. It is an essential tool for communication between healthcare providers and patients, enabling shared decision-making and realistic treatment goal-setting. Monitoring changes in performance status over time can provide valuable insights into a patient’s response to treatment and disease progression. Overall, performance status assessment contributes significantly to personalized and patient-centered medical care