Egret^® software is a statistical package that specializes in offering modelling and graphics capabilities to investigators conducting epidemiological and biomedical studies. Egret is a user-friendly statistical package for epidemiologists.

Comprehensive Set of Models: Many Not Available Elsewhere

• Contingency Tables
• Logistic Regression
• Conditional Logistic Regression*
• Logistic Regression with Random Effects
• Beta-Binomial Regression
• Poisson Regression
• Weibull RegressionExponential Regression
• Cox Proportional Hazards Regression
• Cox Regression with Time-Dependent Covariates
• Kaplan-Meier Analysis and Plots
• Extensive Post-Fit Analysis with Plots, Including Delta-Betas, and Hazard Functions
  Plus a new spreadsheet-based data editor and a statistical scratchpad

Unlike other epidemiology software, Egret permits the case/control ratio to vary over strata without using an approximation for the conditional likelihood function.

Bonus! EpiXact is now built into Egret
Cytel's unique module for exact contingency table analysis for small-samples.

• Odds Ratio Inference
• Exact Test of Homogeneity for Odds Ratios
• Exact Test of Unity for the Common Odds Ratio
• Exact Confidence Interval for the Common Odds Ratio
• Exact Test of Trend for k Ordered Binomial Populations
• Exact Test of Independence for k Unordered Binomial Populations
• Monte Carlo Importance Sampling Option for Difficult Computations