title: Logistic equations in the analysis of S-shaped curves.
abstract: A version of the logistic equation that provides useful descriptive parameters for the asymptote, slope and inflection point of the curve is presented and is suggested for use in empirically fitting S-shaped curves to data. A short SAS program that easily calculates the parameter values is shown.
authors.affiliation: San Diego Clinical Research Associates, Data Management Center, Santa Ana, CA 92705, USA.
authors.forename: F K
authors.initials: FK
authors.lastname: Hoehler
mesh_terms: D015982:Bias; D016001:Confidence Intervals; D003627:Data Interpretation, Statistical; D007928:Lethal Dose 50; D016015:Logistic Models; D015203:Reproducibility of Results