Egret®
Clinical Trials Software for Epidemiological and Biomedical Studies

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 Regression Exponential 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: Cytel's unique 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