Piecewise exponential models to assess the influence of job-specific experience on the hazard of acute injury for hourly factory workers

Table 3 Fit statistics and comparison of models by LRT statistic and Bayes factors using the test set

	Exponential	Weibull	Data-driven 2-piece exponential	Hypothesis-driven 2-piece exponential
Fit statistics
Number of Parameters	8	9	9	9
Log-likelihood	−32576.2	−32573.6	−32447.3	−32468.2
BIC (Smaller is better)	65263.6	65272.2	65019.6	65061.5
Model comparison
LRT Statistic
Bayes Factor
*Exponential*	NA	5.21*	257.9***	216.0***
*Exponential*	NA	1.000	0.996	0.997
*Weibull*	5.21*	NA	Not nested	Not nested
*Weibull*	1.000		0.996	0.997
*Data-driven 2-piece exponential*	257.9***	Not nested	NA	Not nested
*Data-driven 2-piece exponential*	1.004	1.004		1.001
*Hypothesis-driven 2-piece exponential*	216.0***	Not nested	Not nested	NA
	1.003	1.003	0.999

Note: * denotes significance at the 0.05 level, ** denotes significance at the 0.01 level, and *** denotes significance at the 0.001 level.