Treatment Decision-Making: The ECOG score helps healthcare providers decide whether a patient is fit for specific treatments such as chemotherapy, surgery, or radiation therapy. Clinical Trials: The scale is often used as an eligibility criterion for patients enrolling in clinical trials. Prognosis: The ECOG score can provide insights into the patient's likely outcome and survival chances. Quality of Life: It is an indicator of how the disease affects the patient's daily life and well-being.