Simon-Makuch curves for overall survival of patients with splenic B-cell lymphomas, stratified by histology and receipt of splenectomy. P-values are derived from Mantel-Byar tests, unstratified, or stratified by age, sex, stage, and comorbidity index.
DLBCL: diffuse large B-cell lymphoma; FL: follicular lymphoma; MCL: mantle cell lymphoma; SMZL: splenic marginal zone lymphoma