Introduction:Chronic lymphocytic leukemia (CLL) exhibits diverse treatment requirements, with some patients receiving immediate treatment while others remain under observation. In 2008, the International Workshop on Chronic Lymphocytic Leukemia (IWCLL) established criteria for treatment indications, widely adopted in clinical practice and trials. The Brazilian Group of CLL (BGCLL) has been evaluating a more conservative approach to treatment indication performed in multiple centers, which avoids predefined cutoff levels for cytopenias and refrains from considering progressive lymphocytosis, extranodal involvement, or disease-related symptoms as isolated criteria. However, the safety and potential different outcomes of this conservative approach compared to the strict IWCLL criteria remain uncertain. Objective: This study aims to compare the outcomes of CLL patients without indication for treatment according to the BGCLL criteria, who were either treated or not based on the center's decision.