Table 4.
a)Log-rank test, b)Cox proportional hazard model.
Abbreviations: PENL, primary extranodal lymphoma; EFS, event-free survival; OS, overall survival; HR, hazard ratio; CI, confidence interval; ECOG PS, Eastern Clinical Oncology Group performance scale; LDH, lactate dehydrogenase; CHOP, cyclophosphamide, doxorubicin, vincristine, and prednisone; R-CHOP, rituximab-CHOP.