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Table 5 Parametric shared frailty model comparison on time to first birth data of reproductive age women in Ethiopia, 2016 EDHS

From: Time to first birth and its predictors among reproductive-age women in Ethiopia: inverse Weibull gamma shared frailty model

Model Log-likelihood DF AIC Variance of θ LR test of θ = 0
Lognormal gamma 4511.66 34 − 8955.31 0.18 < 0.001
Lognormal inverse Gaussian 4511.62 34 − 8955.24 0.25 < 0.001
Log logistic gamma 4881.54 34 − 9695.08 0.23 < 0.001
Log logistic inverse Gaussian 4936.02 34 − 9804.03 0.87 < 0.001
Inverse Weibull gamma 5708.19 34 − 11,348.37 0.028 < 0.001a
Inverse Weibull inverse Gaussian 5707.78 34 − 11,347.55 0.028  < 0.001
  1. aPreferred model