Table 2.

HRs and 95% CIs for the association between patient characteristics and OS

Univariable modelMultivariable model
Patient characteristicsN (event N)HR (95% CI)PHR (95% CI)P
Race and ethnicity 
 Non-Hispanic White 398 (184) 1.00 (referent)  1.00 (referent)  
 Non-Hispanic Black 52 (19) 0.50 (0.31, 0.81) .005 0.62 (0.37, 1.03) .06 
 Hispanic 45 (12) 0.66 (0.37, 1.19) .2 0.76 (0.42, 1.38) .4 
Age at MM diagnosis* 495 (215) 1.05 (1.04, 1.07) <.001 1.04 (1.02, 1.05) <.001 
Sex 
 Female 206 (85) 1.00 (referent)  1.00 (referent)  
 Male 289 (130) 1.25 (0.95, 1.65) .1 1.19 (0.89, 1.57) .2 
ISS at MM diagnosis 
 I 190 (67) 1.00 (referent)  1.00 (referent)  
 II 123 (55) 1.45 (1.02, 2.08) .04 1.49 (1.04, 2.13) .03 
 III 111 (54) 1.49 (1.04, 2.14) .03 1.33 (0.92, 1.92) .1 
 Unknown 71 (39) 0.86 (0.57, 1.29) .5 0.80 (0.53, 1.21) .3 
HCT 
 No HCT 198 (90) 1.00 (referent)  1.00 (referent)  
 HCT 297 (125) 0.50 (0.38, 0.66) <.001 0.65 (0.47, 0.89) .008 
Frontline treatment 
 PI + IMIDs 197 (58) 1.00 (referent)  1.00 (referent)  
 PI 165 (89) 1.47 (1.06, 2.05) .02 1.44 (1.03, 2.02) .03 
 IMIDs 107 (52) 0.83 (0.56, 1.22) .3 0.75 (0.51, 1.10) .1 
 Others 26 (16) 0.56 (0.31, 1.02) .06 0.67 (0.36, 1.23) .2 
Univariable modelMultivariable model
Patient characteristicsN (event N)HR (95% CI)PHR (95% CI)P
Race and ethnicity 
 Non-Hispanic White 398 (184) 1.00 (referent)  1.00 (referent)  
 Non-Hispanic Black 52 (19) 0.50 (0.31, 0.81) .005 0.62 (0.37, 1.03) .06 
 Hispanic 45 (12) 0.66 (0.37, 1.19) .2 0.76 (0.42, 1.38) .4 
Age at MM diagnosis* 495 (215) 1.05 (1.04, 1.07) <.001 1.04 (1.02, 1.05) <.001 
Sex 
 Female 206 (85) 1.00 (referent)  1.00 (referent)  
 Male 289 (130) 1.25 (0.95, 1.65) .1 1.19 (0.89, 1.57) .2 
ISS at MM diagnosis 
 I 190 (67) 1.00 (referent)  1.00 (referent)  
 II 123 (55) 1.45 (1.02, 2.08) .04 1.49 (1.04, 2.13) .03 
 III 111 (54) 1.49 (1.04, 2.14) .03 1.33 (0.92, 1.92) .1 
 Unknown 71 (39) 0.86 (0.57, 1.29) .5 0.80 (0.53, 1.21) .3 
HCT 
 No HCT 198 (90) 1.00 (referent)  1.00 (referent)  
 HCT 297 (125) 0.50 (0.38, 0.66) <.001 0.65 (0.47, 0.89) .008 
Frontline treatment 
 PI + IMIDs 197 (58) 1.00 (referent)  1.00 (referent)  
 PI 165 (89) 1.47 (1.06, 2.05) .02 1.44 (1.03, 2.02) .03 
 IMIDs 107 (52) 0.83 (0.56, 1.22) .3 0.75 (0.51, 1.10) .1 
 Others 26 (16) 0.56 (0.31, 1.02) .06 0.67 (0.36, 1.23) .2 
*

HR reflects the association of a 1-year increase in age at MM diagnosis with OS.

For the majority of these regimens, patients were also given dexamethasone. Single-agent PIs and IMIDs were used rarely (<5%).

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