Table 4

Multivariable analysis of impact of number of nonpermissive mismatches on severe aGVHD and overall survival

NEvent*Univariate analysis
Multivariate analysis
Bootstrap (10000)
HR (95% CI)PHR (95% CI)PHR (95% CI)P
For severe aGVHD         
    Full match group 972 129 1.00 NA 1.00 NA 1.00 NA 
    Zero nonpermissive mismatch group 2446 411 1.21 (0.95-1.54) .111 1.00 (0.75-1.32) .996 1.00 (0.74-1.33) .996 
    One nonpermissive mismatch group 571 211 2.88 (2.20-3.78) < .001 2.22 (1.62-3.04) < .001 2.22 (1.63-3.02) < .001 
    Two or more nonpermissive mismatch group 61 36 5.62 (3.77-8.39) < .001 3.68 (2.33-5.80) < .001 3.68 (2.33-5.80) < .001 
For overall survival         
    Full match group 972 400 1.00 NA 1.00 NA 1.00 NA 
    Zero nonpermissive mismatch group 2446 1021 1.10 (0.98-1.23) .091 1.06 (0.94-1.20) .315 1.06 (0.94-1.20) .299 
    One nonpermissive mismatch group 571 309 1.55 (1.34-1.78) < .001 1.51 (1.30-1.76) < .001 1.51 (1.29-1.77) < .001 
    Two or more nonpermissive mismatch group 61 39 2.12 (1.54-2.90) < .001 2.25 (1.65-3.08) < .001 2.25 (1.65-3.08) < .001 
NEvent*Univariate analysis
Multivariate analysis
Bootstrap (10000)
HR (95% CI)PHR (95% CI)PHR (95% CI)P
For severe aGVHD         
    Full match group 972 129 1.00 NA 1.00 NA 1.00 NA 
    Zero nonpermissive mismatch group 2446 411 1.21 (0.95-1.54) .111 1.00 (0.75-1.32) .996 1.00 (0.74-1.33) .996 
    One nonpermissive mismatch group 571 211 2.88 (2.20-3.78) < .001 2.22 (1.62-3.04) < .001 2.22 (1.63-3.02) < .001 
    Two or more nonpermissive mismatch group 61 36 5.62 (3.77-8.39) < .001 3.68 (2.33-5.80) < .001 3.68 (2.33-5.80) < .001 
For overall survival         
    Full match group 972 400 1.00 NA 1.00 NA 1.00 NA 
    Zero nonpermissive mismatch group 2446 1021 1.10 (0.98-1.23) .091 1.06 (0.94-1.20) .315 1.06 (0.94-1.20) .299 
    One nonpermissive mismatch group 571 309 1.55 (1.34-1.78) < .001 1.51 (1.30-1.76) < .001 1.51 (1.29-1.77) < .001 
    Two or more nonpermissive mismatch group 61 39 2.12 (1.54-2.90) < .001 2.25 (1.65-3.08) < .001 2.25 (1.65-3.08) < .001 

Each group was compared with Full match group. Confounders considered were sex (donor-recipient pairs), patient age (linear), donor age (linear), type of disease, risk of leukemia relapse (standard, highand diseases other than leukemia), GVHD prophylaxis, (CSP vs. FK), ATG (ATG vs. no ATG) and preconditioning (TBI vs. non-TBI).

HR indicates hazard ratio; CI, confidence interval; Boot strap (10000), bootstrap resampling using 10000 bootstrapping.

*

For severe aGVHD, “Event” refers to number of occurrences; for overall survival, number of deaths.

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