Table 1.

Efficacy outcomes in the efficacy analysis set, according to IWG 2006 response criteria

Efficacy outcomesMDS substudy efficacy analysis set (N = 18)95% CI
Primary end point, n (%)   
CR + PR 7 (38.9) (17.3-64.2) 
Secondary end points   
Time to CR + PR, median mo (min, max) 1.87 (1.0, 5.6) (58.6-96.4) 
Duration of CR + PR, median mo (min, max) NR (1.9, NR)  
Probability of patients maintaining CR + PR, n (%)   
At 3 mo 85.7  
At 24 mo 68.6  
At 60 mo 68.6  
Best overall response   
ORR  15 (83.3) (58.6-96.4) 
CR 7 (38.9) (17.3-64.3) 
PR (0.0-18.5) 
mCR 8 (44.4) (21.5-96.2) 
SD 2 (11.1) (1.4-34.7) 
PDis 1 (5.6) (0.1-27.3) 
Time to OR, median months (min, max) 0.99 (0.9, 4.6)  
HI in non-CR/PR patients, n (%)   
Erythrocyte lineage 2 (18.2)   
Platelet lineage 2 (25.0)§   
Neutrophil lineage 4 (57.1)   
Any HI lineage 4 (36.4)   
OS, median months, [95% CI] (min, max) 35.7 [13.1, NE] (3.7#, 88.7# 
OS rate, (%)   
1 y 86.9  
3 y 46.3  
5 y 46.3  
7 y 46.3  
Efficacy outcomesMDS substudy efficacy analysis set (N = 18)95% CI
Primary end point, n (%)   
CR + PR 7 (38.9) (17.3-64.2) 
Secondary end points   
Time to CR + PR, median mo (min, max) 1.87 (1.0, 5.6) (58.6-96.4) 
Duration of CR + PR, median mo (min, max) NR (1.9, NR)  
Probability of patients maintaining CR + PR, n (%)   
At 3 mo 85.7  
At 24 mo 68.6  
At 60 mo 68.6  
Best overall response   
ORR  15 (83.3) (58.6-96.4) 
CR 7 (38.9) (17.3-64.3) 
PR (0.0-18.5) 
mCR 8 (44.4) (21.5-96.2) 
SD 2 (11.1) (1.4-34.7) 
PDis 1 (5.6) (0.1-27.3) 
Time to OR, median months (min, max) 0.99 (0.9, 4.6)  
HI in non-CR/PR patients, n (%)   
Erythrocyte lineage 2 (18.2)   
Platelet lineage 2 (25.0)§   
Neutrophil lineage 4 (57.1)   
Any HI lineage 4 (36.4)   
OS, median months, [95% CI] (min, max) 35.7 [13.1, NE] (3.7#, 88.7# 
OS rate, (%)   
1 y 86.9  
3 y 46.3  
5 y 46.3  
7 y 46.3  

NR, not estimable; OR, objective response; ORR, objective response rate; PDis, progressive disease; SD, stable disease.

Kaplan-Meier estimate of duration of CR + PR.

OR comprised CR, PR, or mCR.

% based on number of patients with mCR and pretreatment hemoglobin <11 g/dL (N1 = 11).

§

% based on number of patients with mCR and pretreatment platelet count <100 × 109/L (N2 = 8).

% based on patients with mCR and pretreatment absolute neutrophil count <1.0 × 109/L (N3 = 7).

% based on patients with mCR and who satisfy the pretreatment criteria for HI-erythrocyte, HI-platelet, or HI-neutrophil (N4 = 11).

#

Censored observation.