Table 3. Cytogenetic Risk Groups based on the Byrd classification for 3 different endpoints (20).

	All Patients N=517		COG N=281		CALGB N=149		SWOG N=87
Risk Group for CR	N	%	N	%	N	%	N	%	p-value
Favorable	79	27%	42	26%	27	28%	10	32%	0.889
Intermediate	176	62%	101	63%	54	57%	21	68%	0.459
Adverse	31	11%	17	11%	14	15%	0	0%	0.050
Unknown	231		121		54		56
Risk Group for Relapse
Favorable	79	29%	42	28%	27	30%	10	33%	0.797
Intermediate	156	58%	87	57%	50	56%	19	63%	0.756
Adverse	37	14%	23	15%	13	14%	1	3%	0.225
Unknown	245		129		59		57
Risk Group for Overall Survival
Favorable	80	28%	42	26%	28	29%	10	32%	0.732
Intermediate	141	50%	80	50%	45	47%	16	52%	0.887
Adverse	65	22%	38	24%	22	23%	5	16%	0.646
Unknown	231		121		54		56