Table 2.

Univariate and multivariate logistic regression analyses for major and deep response in 319 patients with WM treated with ibrutinib monotherapy

Major responseUnivariate analysisMultivariate analysis
VariablesOR (95% CI)POR (95% CI)P
 Age >65 years 1.53 (0.90-2.61) .12   
 Male sex 1.19 (0.69-2.06) .53 
 Hemoglobin <11.5 g/dl 2.25 (1.28-3.93) .005 2.72 (1.25-5.95) .01 
 Platelet <100 k/ul 0.50 (0.25-2.45) .05   
 β2-microglobulin >3 mg/l 2.41 (1.31-4.43) .005 1.54 (0.68-3.45) .30 
 Albumin <3.5 g/dl 1.69 (0.88-3.24) .12   
 Serum IgM >4000 mg/dl 1.29 (0.74-2.24) .36   
 Serum IgM >7000 mg/dl 0.40 (0.14-1.17) .09 
 Bone marrow >60% 2.03 (1.14-3.62) .02 2.26 (0.98-5.21) .06 
 Previously treated 0.92 (0.52-1.64) .78   
CXCR4 mutated 0.33 (0.17-0.61) <.001 0.20 (0.09-0.45) <.001 
CXCR4 WT 1.00  1.00  
CXCR4 NS 0.24 (0.12-0.48) <.001 0.19 (0.01-0.37) <.001 
CXCR4 FS 0.69 (0.25-1.87) .47 0.40 (0.13-1.23) .11 
Deep response Univariate analysis Multivariate analysis 
Variables OR (95% CI) P OR (95% CI) P 
 Age >65 years 1.04 (0.63-1.71) .88  
 Male sex 1.08 (0.65-1.82) .76 
 Hemoglobin <11.5 g/dl 1.94 (1.07-3.53) .03 2.34 (1.14-4.80) .02 
 Platelet <100 k/ul 1.03 (0.50-2.11) .94  
 β2-microglobulin >3 mg/l 1.46 (0.81-2.64) .21   
 Albumin <3.5 g/dl 1.70 (1.01-2.88) .05   
 Serum IgM >4000 mg/dl 0.60 (0.36-1.01) .05   
 Serum IgM >7000 mg/dl 0.64 (0.18-2.34) .50   
 Bone marrow >60% 1.65 (0.96-2.83) .07   
 Previously treated 1.31 (0.76-2.25) .33 
CXCR4 mutated 0.34 (0.18-0.66) .001 0.32 (0.15-0.55) .001 
CXCR4 WT 1.00  1.00  
CXCR4 NS 0.26 (0.11-0.61) .002 0.25 (0.11-0.60) .002 
CXCR4 FS 0.53 (0.21-1.31) .17 0.47 (0.19-1.16) .11 
Major responseUnivariate analysisMultivariate analysis
VariablesOR (95% CI)POR (95% CI)P
 Age >65 years 1.53 (0.90-2.61) .12   
 Male sex 1.19 (0.69-2.06) .53 
 Hemoglobin <11.5 g/dl 2.25 (1.28-3.93) .005 2.72 (1.25-5.95) .01 
 Platelet <100 k/ul 0.50 (0.25-2.45) .05   
 β2-microglobulin >3 mg/l 2.41 (1.31-4.43) .005 1.54 (0.68-3.45) .30 
 Albumin <3.5 g/dl 1.69 (0.88-3.24) .12   
 Serum IgM >4000 mg/dl 1.29 (0.74-2.24) .36   
 Serum IgM >7000 mg/dl 0.40 (0.14-1.17) .09 
 Bone marrow >60% 2.03 (1.14-3.62) .02 2.26 (0.98-5.21) .06 
 Previously treated 0.92 (0.52-1.64) .78   
CXCR4 mutated 0.33 (0.17-0.61) <.001 0.20 (0.09-0.45) <.001 
CXCR4 WT 1.00  1.00  
CXCR4 NS 0.24 (0.12-0.48) <.001 0.19 (0.01-0.37) <.001 
CXCR4 FS 0.69 (0.25-1.87) .47 0.40 (0.13-1.23) .11 
Deep response Univariate analysis Multivariate analysis 
Variables OR (95% CI) P OR (95% CI) P 
 Age >65 years 1.04 (0.63-1.71) .88  
 Male sex 1.08 (0.65-1.82) .76 
 Hemoglobin <11.5 g/dl 1.94 (1.07-3.53) .03 2.34 (1.14-4.80) .02 
 Platelet <100 k/ul 1.03 (0.50-2.11) .94  
 β2-microglobulin >3 mg/l 1.46 (0.81-2.64) .21   
 Albumin <3.5 g/dl 1.70 (1.01-2.88) .05   
 Serum IgM >4000 mg/dl 0.60 (0.36-1.01) .05   
 Serum IgM >7000 mg/dl 0.64 (0.18-2.34) .50   
 Bone marrow >60% 1.65 (0.96-2.83) .07   
 Previously treated 1.31 (0.76-2.25) .33 
CXCR4 mutated 0.34 (0.18-0.66) .001 0.32 (0.15-0.55) .001 
CXCR4 WT 1.00  1.00  
CXCR4 NS 0.26 (0.11-0.61) .002 0.25 (0.11-0.60) .002 
CXCR4 FS 0.53 (0.21-1.31) .17 0.47 (0.19-1.16) .11 

MYD88 mutational status was not included as sample size for MYD88 wild-type status was small (n = 8).

FS, frameshift; NS, nonsense; WT, wild type.