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About

A Collaborative, Open-Source Project in Epidemiologic Computing

The OpenEpi Collection of Epidemiologic Calculators

Version 3.01 -- Released April 4 and revised April 6, 2013

See Menu Intro Page for a Suggested Citation

and

Individual Modules for Authors and Addresses

OpenEpi is an Open Source effort to replace and extend the EpiTable and Statcalc programs in Epi Info with web-compatible programs and links in JavaScript. Although OpenEpi is not a direct product of the Centers for Disease Control and Prevention(CDC), the OpenEpi and Epi Info teams communicate frequently and share many of the same goals.

Background

   Commercial software does not always meet the needs of epidemiologists

   Hundreds of statistical calculators are available, e.g., Statcalc, PEPI, spreadsheet-based, web-based, etc.

   There is wide variation in usability, layout, documentation, breadth of coverage, accuracy, and access to source code

 

Goals of OpenEpi

   Provide up-to-date, documented, tested programs using a common interface

   Run programs across the web or locally

   Platform independence

   Open Source approach

   Foster interaction among epidemiologists and others in development

 

How does OpenEpi achieve these goals?

   Use of JavaScript and HTML

   Platform independent (Win, Mac, Unix)

   Included with browsers (Explorer, Netscape, etc.)

   Interpretive (source code available)

   Make programs available from a server or allow user to download and run locally

   Common Interface

   Standard data entry screens

   Standard output

   Standard graphics

 

Status of OpenEpi

    Analytic routines (for users)

   CI for a single proportion or rate, median percentile

t-test and ANOVA

   2x2 table (counts or person-time rates)

   RxC table

   Pair-matched analysis

   Sample size calculators for proportions, unmatched case-control and cohort studies, and mean difference

Power calculations for cohort, cross-sectional, and unmatched case-control studies, clinical trials, and mean difference

   Random number generator

   Dose Response (chi square for trend)

   Diagnostic method evaluation

Options to set table orientation, confidence level, and (if available) language

Ability to download the entire package and run it from a hard disk or from a CDROM

    Tool box for developers

    Simple methods for translation into non English languages

 

Features …

     Stratified tables

     Screening tests

     Saving result files (MS Windows only for now)

     Loading demo data from result file

     File naming convention and directory structure

     Robust data entry (no instructions needed)

     Automatic column and row totals

     'Check Code' in JavaScript

     HTML output

 

Collaboration

    We would like your input:

       What types of analyses?

       Did you find any problems or errors?

      Would you assist in testing programs?

      Would you like to develop programs?

       Which links should we have?

       Please email us at the addresses on the main menu