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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