Table 2.

Chemotherapy regimens

Chemotherapy regimen	First-line treatment
	Rituximab + chemotherapy (n = 407)		Chemotherapy alone (n = 231)		Overall (n = 638)
	n	%	n	%	n	%
CHOP	208	51.1	78	33.8	286	44.8
CNOP	18	4.4	16	6.9	34	5.3
CVP	51	12.5	44	19.0	95	14.9
Other*	130	31.9	93	40.3	223	35.0

^*This group includes 70 patients (46 of 130 [35%] rituximab plus chemotherapy and 24 of 93 [26%] chemotherapy alone) who received cyclophosphamide alone or as part of a regimen other than CHOP, CNOP, or CVP. It also includes 35 patients (23 of 130 [18%] rituximab plus chemotherapy and 12 of 93 [13%] chemotherapy alone) who received either fludarabine or cytarabine without cyclophosphamide.