Table 3

Predictors of transplant-related mortality

PredictorUnivariateMultivariate
Hazard ratioP valueHazard ratioP value
Age (years) 0.99 (0.96-1.03) .753   
Gender (female) 1.18 (0.49-2.79) .708   
Underlying disease (leukemia vs other) 0.65 (0.26-1.55) .338   
Pretransplant comorbidity (HCT-CI >3) 2.58 (1.05-6.14) .040 1.85 (0.72-4.65) .195 
Disease risk*     
 Low 1.0 —   
 Intermediate 2.02 (0.63-6.49) .229   
 High 1.14 (0.41-3.40) .803   
Conditioning intensity     
 Nonmyeloablative 1.0 —   
 Reduced intensity 1.78 (0.51-8.12) .378   
 Myeloablative 1.36 (0.41-6.05) .635   
Stem cell source     
 Related identical sibling 1.0 —   
 Unrelated identical 0.71 (0.19-2.35) .581   
 Unrelated nonidentical 1.66 (0.36-5.97) .480   
 Cord blood 1.91 (0.65-5.59) .230   
 T-cell depletion (ex-vivo) 0.98 (0.41-2.33) .969   
Time to engraftment (≥4 d post-HSCT) 1.61 (0.57-3.97) .344   
Ursodeoxycholic acid 0.85 (0.25-2.31) .774   
Liver dysfunction (total bilirubin > twice baseline) 1.32 (0.31-3.90) .668   
Acute kidney injury (creatinine > twice baseline) 1.88 (0.74-4.46) .175 1.32 (0.48-3.42) .572 
TPN 2.15 (0.73-9.20) .179 1.68 (0.50-7.76) .426 
Antibiotics     
 Vancomycin (intravenous) 2.65 (0.55-47.46) .269   
 Fluoroquinolone 0.50 (0.14-1.36) .186 0.43 (0.12-1.24) .124 
 Metronidazole 1.43 (0.54-3.45) .446   
 β-lactam§ 4.89 (1.02-87.84) .047 1.65 (0.28-31.89) .630 
Infections     
C difficile infection 1.00 (0.29-2.71) .998   
 Gram-negative bloodstream infection 1.35 (0.32-4.00) .643   
 VRE bloodstream infection 1.79 (0.29-6.19) .468   
Microbial diversity (engraftment)     
 High diversity (inverse Simpson >4) 1.0 — 1.0 — 
 Intermediate diversity (inverse Simpson 2-4) 3.07 (0.60-22.14) .179 3.02 (0.56-22.92) .202 
 Low diversity (inverse Simpson <2) 7.54 (2.12-47.88) .001 5.25 (1.36-35.07) .014 
PredictorUnivariateMultivariate
Hazard ratioP valueHazard ratioP value
Age (years) 0.99 (0.96-1.03) .753   
Gender (female) 1.18 (0.49-2.79) .708   
Underlying disease (leukemia vs other) 0.65 (0.26-1.55) .338   
Pretransplant comorbidity (HCT-CI >3) 2.58 (1.05-6.14) .040 1.85 (0.72-4.65) .195 
Disease risk*     
 Low 1.0 —   
 Intermediate 2.02 (0.63-6.49) .229   
 High 1.14 (0.41-3.40) .803   
Conditioning intensity     
 Nonmyeloablative 1.0 —   
 Reduced intensity 1.78 (0.51-8.12) .378   
 Myeloablative 1.36 (0.41-6.05) .635   
Stem cell source     
 Related identical sibling 1.0 —   
 Unrelated identical 0.71 (0.19-2.35) .581   
 Unrelated nonidentical 1.66 (0.36-5.97) .480   
 Cord blood 1.91 (0.65-5.59) .230   
 T-cell depletion (ex-vivo) 0.98 (0.41-2.33) .969   
Time to engraftment (≥4 d post-HSCT) 1.61 (0.57-3.97) .344   
Ursodeoxycholic acid 0.85 (0.25-2.31) .774   
Liver dysfunction (total bilirubin > twice baseline) 1.32 (0.31-3.90) .668   
Acute kidney injury (creatinine > twice baseline) 1.88 (0.74-4.46) .175 1.32 (0.48-3.42) .572 
TPN 2.15 (0.73-9.20) .179 1.68 (0.50-7.76) .426 
Antibiotics     
 Vancomycin (intravenous) 2.65 (0.55-47.46) .269   
 Fluoroquinolone 0.50 (0.14-1.36) .186 0.43 (0.12-1.24) .124 
 Metronidazole 1.43 (0.54-3.45) .446   
 β-lactam§ 4.89 (1.02-87.84) .047 1.65 (0.28-31.89) .630 
Infections     
C difficile infection 1.00 (0.29-2.71) .998   
 Gram-negative bloodstream infection 1.35 (0.32-4.00) .643   
 VRE bloodstream infection 1.79 (0.29-6.19) .468   
Microbial diversity (engraftment)     
 High diversity (inverse Simpson >4) 1.0 — 1.0 — 
 Intermediate diversity (inverse Simpson 2-4) 3.07 (0.60-22.14) .179 3.02 (0.56-22.92) .202 
 Low diversity (inverse Simpson <2) 7.54 (2.12-47.88) .001 5.25 (1.36-35.07) .014 
*

ASBMT RFI classification.

Evaluated during pre-engraftment period prior to specimen collection.

Fluoroquinolone antibiotics consist of ciprofloxacin and levofloxacin.

§

β-lactams include cephalosporins, β-lactam-β-lactamase combinations, and carbapenems.

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