항암제 치료를 받은 환자와 통증 완화 목적으로 방사선 치료 등의 완화 치료만을 받은 환자로 나눠 각각의 생존율을 비교했다.
Each survival rate was compared by dividing patients who received chemotherapy and patients who received only relief treatments such as radiation therapy for pain relief purposes.