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Table 1 Log-likelihood, number of estimated parameters and AIC for four nested non-linear logistic regression models fitted to the Pancreas data

From: On the analysis of clonogenic survival data: Statistical alternatives to the linear-quadratic model

Model \(\ln (\mathcal {L})\) p+1 AIC
Mean function (3) 258.24 37 −442.48
ϕ 4=1 249.59 28 −443.18
ϕ 4=1, ϕ 1=0, 247.06 19 −456.11
ϕ 4=1, ϕ 1=0, ϕ 3=1 80.17 10 −140.34