Logistic equations in the analysis of S-shaped curves.
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.
Hoehler
F K
FK
San Diego Clinical Research Associates, Data Management Center, Santa Ana, CA 92705, USA.
D015982:Bias; D016001:Confidence Intervals; D003627:Data Interpretation, Statistical; D007928:Lethal Dose 50; D016015:Logistic Models; D015203:Reproducibility of Results