Table 4.

Complete remission rates, reasons for failure, relapse risk, and survival in Medical Research Council trial AML11 by the new hierarchical cytogenetic risk group

Cytogenetic risk group4-150Total no.CR and reason for failureRelapse risk at 5 years, % (SE)Overall survival
CR rate, %Induction deaths, %Resistant disease, %At 5 years, % (SE)Median
Favorable 78 724-151 21 84-151 56  (7.5)4-151 34  (5.7)4-151 559 days4-151 
Intermediate 842 59 18 23 81  (1.9) 13  (1.2) 276 days  
Adverse 145 26 19 56 91  (5.1) 2  (1.2) 113 days 
Cytogenetic risk group4-150Total no.CR and reason for failureRelapse risk at 5 years, % (SE)Overall survival
CR rate, %Induction deaths, %Resistant disease, %At 5 years, % (SE)Median
Favorable 78 724-151 21 84-151 56  (7.5)4-151 34  (5.7)4-151 559 days4-151 
Intermediate 842 59 18 23 81  (1.9) 13  (1.2) 276 days  
Adverse 145 26 19 56 91  (5.1) 2  (1.2) 113 days 

P values are for Mantel-Haenszel (CR and reasons for failure) or log-rank (relapse risk and overall survival) test for trend. All P values remain at a similar level of significance when adjusted for age, type of leukemia (de novo or secondary), and white blood count at presentation.

CR indicates complete remission.

F4-150

Favorable: t(15;17), t(8;21), or inv(16) whether alone or in conjunction with other abnormalities. Intermediate: normal karyotype, all other noncomplex abnormalities. Adverse: complex karyotype (5 or more unrelated abnormalities), excluding cases with t(15;17), t(8;21), and inv(16).

F4-151

P < .001.

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