Epi Info™ User Guide

Getting Started


A Database and Statistics Program for Public Health Professionals

Core Epi Info Team (in alphabetical order):

  • Sachin Agnihotri
  • José Aponte
  • Tom Arner
  • David Brown
  • Harold Collins
  • John Copeland
  • Ninad Date
  • Karen DeRosa
  • Roger Friedman
  • Zack Gao
  • James Haines
  • Asad Islam (Team Leader)
  • Gerald Jones
  • Erik Knudsen
  • Mohammed Lamtahri
  • Matthew Lantinga
  • Leslyn McNabb
  • Kishore Meduri
  • Jeremy Miller
  • Roger Mir
  • Victor Natick
  • Chelsea Navo
  • David Nitschke
  • Suma Paritala
  • Julio Rodriguez-Estevez
  • Ilana Schafer
  • Daniel Shorter
  • Meng Hua Shu
  • Donald Chris Smith
  • Godha Sunki
  • Thomasine Thomas
  • Mohammad Usman
  • Carol Worsham

Special thanks to:

  • Sara Bedrosian
  • Doug Bialecki
  • Sara Branch
  • Karl August Brendel, III
  • Andy Dean
  • Robert Fagan
  • Gabriel Rainisch
  • Donald Chris Smith
  • Enrique Nieves
Suggested citation: Dean AG, Arner TG, Sunki GG, Friedman R, Lantinga M, Sangam S, Zubieta JC, Sullivan KM, Brendel KA, Gao Z, Fontaine N, Shu M, Fuller G, Smith DC, Nitschke DA, and Fagan RF. Epi Info™, a database and statistics program for public health professionals. CDC, Atlanta, GA, USA, 2011.

Additional thanks to:

EIS Epi Info 7 Workgroup

  • Sudhir Bunga
  • Timothy Cunningham
  • Nancy Fleischer
  • Alyson Goodman
  • Asha Ivy
  • Jeffrey Miller
  • Timothy Minniear (Chairperson)
  • Diane Morof
  • Cyrus Shahpar
  • Danielle Tack
  • Christopher Taylor
  • Ellen Yard

PHPS Epi Info 7 Workgroup

  • Tegan L. Callahan
  • Sarah Elkerholm
  • Coby E. Jansen
  • Amy V. Neuwelt
  • Cristina M. Rodriguez Hart
  • Tina J. Sang
  • Anna S. Talman (Chairperson)
  • Angela s. Tang
  • Sharron H. Wyatt
  • Angela Aina
  • Valerie Bampoe
  • Sandi Brown
  • Martin Celaya
  • Turquoise Griffith
  • Tiffany Humbert-Rico (Co-Chair)
  • Abigail Johnson
  • Clinton McDaniel
  • Kara McGinnis (Co-Chair)
  • Sadiya Muqueeth
  • Judith Robinson
  • Julie Shaffner
  • Delia Tibbs
  • Rebekah Turner

Special thanks to past contributions:

Previous versions produced in collaboration with the World Health Organization (WHO), Geneva, Switzerland, by Andrew G. Dean, Jeffrey A. Dean, Denis Coulombier, Anthony H. Burton, Karl A. Brendel, Donald C. Smith, Richard C. Dicker, Kevin M. Sullivan, Thomas G. Arner, and Robert F. Fagan.

  • Manual by Andrew G. Dean, Juan Carlos Zubieta, Kevin M. Sullivan, Cecile Delhumeau, Ralph H. Lord, Jr., Shonna Luten, and Shannon Jones.
  • Tutorial exercises by Juan Carlos Zubieta, Consuelo M. Beck-Sagué, G. Allen Tindol, Karen DeRosa, Jinghong Ma, and Shannon Jones.

Division of Epidemiology and Analytic Methods
Epidemiology and Analysis Program Office
Office of Surveillance, Epidemiology, and Laboratory Services
Centers for Disease Control and Prevention (CDC)
1600 Clifton Road, (Mail Stop E-33)
Atlanta, GA 30333

This manual and the programs are in the public domain and may be freely copied, translated, and distributed. All are available at www.cdc.gov/epiinfo.

Additional Acknowledgements

StatClac algorithms and formulas provided by OpenEpi.com.
Aberration detection algorithms provided by the CDC’s Early Aberration Reporting System (EARS). For more information on EARS visit: http://emergency.cdc.gov/surveillance/ears/

Equations Acknowledgements

We thank Drs. David Martin and Harland Austin for use of their source code for computing exact and mid-p exact statistical tests and confidence intervals for the odds and rate ratios. Thanks to reviewers of this chapter who provided comments, and to the software testers.

Epi Info’s Nutrition Project File (replaces NutStat) Acknowledgements

Special thanks to Kevin Sullivan, Ph.D., Department of Pediatrics, School of Medicine and Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA; Nathan Gorstein, WHO; Phillip Neibrug, M.D., M.P.H., Norman Staehling, M.S., Ronald Fichtner, Ph.D., and Frederick Trowbridge, M.D., CDC, for their assistance in preparing the Epi Info™ 6 manual upon which portions of this manual are based.


These programs are provided in the public domain to promote public health. We encourage you to provide copies of the programs and the manual to friends and colleagues. The programs may be freely translated, copied, distributed, or even sold without restriction except as noted below. No warranty is made or implied for use of the software for any particular purpose.

“Epi Info” is a trademark of the CDC. Please observe the following requests:

The programs can be translated and the examples altered for regional use, but must be distributed in essentially the form supplied by CDC.

Epi Info is written in C# .NET and runs on version 3.5 of the Microsoft .NET Framework.

Microsoft, Windows, Word, and Visual Basic are registered trademarks of Microsoft Corp. Trade names are used for identification or examples; no endorsement of particular products is intended or implied. The use of trade names or trademarks in this manual does not imply that such names, as understood by the Trade Marks and Merchandise Marks Act, may be used freely by anyone.

Technical Support

For new versions of the software and answers to commonly asked questions, please visit the Epi Info website at https://www.cdc.gov/epiinfo.  Technical assistance is provided through our Epi Info Service Desk portal hosted by Atlassian.   The Epi Info User Community Questions and Answers provides a forum for user to post questions and other users or members of our Help Desk team to post answers: https://epiinfo.atlassian.net/wiki/questions.

If you see a message like “Access denied”, you may need to visit https://epiinfo.atlassian.net/servicedesk/customer/portal/1/user/signup to sign up for an account and then, while signed in, visit the questions link above.

Contact Us

Please send comments and suggestions for future versions to the Epi Info Service Desk by going to:
If you already have an account, click the “Log In” link or you can log in to your existing account here:
Otherwise, please submit your email address to receive a private sign up link.