Prognostic factors of survival time after hematopoietic stem cell transplant in acute lymphoblastic leukemia patients: Cox proportional hazard versus accelerated failure time models

Table 2 Discrimination among Distributions Using Maximum Likelihood (LL) and Akaike Information Criteria (AIC) (n = 206)

			GG family
Model No.	Variables name	Goodness of fit criteria	Exponential	Weibull	Log normal	GG	Log-logistic	Best model
1	Without covariate	-LL AIC	251.7 503.4	240.9 483.8	233.1 468.2	227.3 458.6	236.6 475.2	GG
2	aGVHD	-LL AIC	231.1 464.2	218.6 441.2	211.1 426.2	202.6 411.2	214.7 423.4	GG
3	cGVHD	-LL AIC	225.7 453.4	212.5 429.0	204.4 412.8	195.1 396.2	208.1 420.2	GG
4	Platelet recovery	-LL AIC	240.6 438.2	231.0 466.0	223.2 450.4	214.4 434.8	227.2 458.4	GG
5	Relapse	-LL AIC	216.2 434.4	213.2 430.4	219.3 442.6	210.5 427.0	218.0 440.0	GG
6	Neutrophil recovery	-LL AIC	248.5 499.0	238.2 480.4	230.2 464.4	218.9 443.8	234.2 472.4	GG
7*	aGVHD, cGVHD, relapse, platelet recovery, neutrophil recovery	-LL AIC	181.2 372.4	177.9 367.8	179.1 370.2	178.1 370.2	179.1 370.2	Weibull
8	aGVHD, cGVHD, relapse, platelet recovery, neutrophil recovery patients' age and sex	-LL AIC	180.4 374.8	177.2 370.4	177.6 371.2	177.4 372.8	178.0 372.0	Weibull

*Final Model, GG; Generalized Gamma, cGVHD; chronic graft-versus-host disease. AIC = -2LL+2P, where p is the number of parameters in the model, Model number 7 is the best fitted model because it has the smallest AIC.

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