Winpepi

Winpepi is a free statistical software package for use in medicine and epidemiology. It is a collection of programs rather than a single, unified application. These programs perform a wide range of statistical calculations and analyses commonly used in epidemiological studies, clinical trials, and public health research. Developed by J. H. Abramson, Winpepi has been widely used and cited for its simplicity and focus on core epidemiological methods.

The Winpepi package includes modules for tasks such as:

• Calculating measures of disease frequency and association (e.g., odds ratios, relative risks, attributable risks).
• Performing chi-squared tests, t-tests, and other statistical tests.
• Conducting meta-analysis and assessing publication bias.
• Calculating sample size and power.
• Analyzing categorical data.
• Standardizing rates.
• Creating and analyzing life tables.
• Implementing regression models.

Winpepi is known for its ease of use, making it accessible to researchers with limited statistical programming experience. The software is distributed as a collection of executable files, each dedicated to a specific type of analysis. Users select the appropriate program for their needs and input their data, usually in a simple text format. While it might lack the advanced features and graphical capabilities of more comprehensive statistical software packages, Winpepi remains a valuable tool for performing fundamental epidemiological calculations and analyses.