This study provides evidence that older patients with Binet stage A CLL, including those in the oldest age groups, can receive the Chronic Lymphocytic Leukemia International Prognostic Index (CLL-IPI). Because of the high median age in our study, we were also able to identify a relationship between del(17p) and age, which raises the possibility that age-adjusted prognostic tools could enhance CLL prediction. In cardiology, risk stratifications and recommendations for antilipid treatment have long taken into account the interaction between age and other risk factors for fatal cardiovascular disease, but in CLL, age is typically only considered as an additive factor in prognostic models.