Survival curves. Patients with thrombocytopenia due to tumor infiltration (Rai 4) or immune mediated (IT) at the time of CLL diagnosis are compared with other CLL patients (Others). Log-rank test results were P = .03 between “Others” and “IT at diagnosis”, P = .47 between “Rai 4” and “IT at diagnosis”, P < .001 between “Others” and “Rai 4.”