This model is known as the 4 parameter logistic regression (4PL). It is quite useful for dose response and/or receptor-ligand binding assays, or other similar types of assays. As the name implies, it has 4 parameters that need to be estimated in order to “fit the curve”. The model...
Regression modelResidual analysis47N3097K7097K80In this paper we introduce a flexible extension of the Gumbel distribution called the odd log-logistic exponentiated Gumbel distribution. The new model was implemented in GAMLSS package of R software and a brief tutorial on how to use this package ...
In recent years, interest in the four-parameter logistic (4PL) model (Barton and Lord, ETS Res Rep Ser 198(1):i-8, 1981), and its normal ogive equivalent, has been renewed (Culpepper, Psychometrika, 81(4):1142–1163, 2016; Feuerstahler and Waller (Multiv
Four-parameter log-logistic model and log-logistic model with competing risk analysis indicated age at diagnosis and BMI as the prognosis.Conclusions: The current study indicated age and BMI as prognosis of CRC, using a 4-parameter log-logistic model with compet- ing risk analysis. Although the...
Shayan Z Ayatollahi SMT and Zare N. A parametric method for cumulative incidence modeling with a new four-parameter log-logistic distribution. Theor Biol Med Model 2011; 8: 3.JP: Parametric regression on cumulative incidence function. Biostatistics 2007, 8:184-196. doi:10.1186/1742-4682-8-43...