In order to calculate sample size using Epi Info 7, one requires to provide the following information (shown in red): Requirements for calculating sample size using Epi Info 7 (cross-sectional studies) Step 3: Select Cross Sectional Study from the options (shown in red)ī.3. Step 2: Select StatCalc from the menu of options (shown in red) Step 1: Launch Epi Info 7 (please watch video above on downloading and installing Epi Info 7) Launching Cross-Sectional Study within Stat Calc tool of Epi Info 7 Similarly, the exposure is CAD (those who have CAD are ‘exposed’)īy extension, those without CAD (general population) would constitute the ‘unexposed’ group.Īs the investigator wishes to determine the prevalence of NAFLD, the appropriate study design is a cross-sectional study (cross-sectional studies are also called ‘prevalence’ studies).ī. Since one intends to determine the prevalence of NAFLD among CAD patients, the outcome of interest is NAFLD Therefore, the study population is patients with CAD. The investigator wishes to determine the prevalence of Non-Alcoholic Fatty Liver Disease (NAFLD) among persons with Coronary Artery Disease (CAD). If you want to view the video providing instructions on downloading the software, you may do so here. The CDC has produced several tutorial videos for Epi Info 7 that can be viewed here. It also includes a tool for sample size calculation. It provides for easy data entry form and database construction, a customized data entry experience, and data analyses with epidemiologic statistics, maps, and graphs for public health professionals who may lack an information technology background. The latest version of Epi Info is Epi Info 7. Background Information:Įpi Info™ is public domain set of software tools developed by the United States’ Centers for Disease Control and Prevention (CDC) for use by public health professionals and researchers. I believe many more would benefit from a public response, hence this article. Recently, someone asked a question that involved calculating sample size with Epi Info 7. Each calculator has been adapted for iOS and is included in this app.I receive a lot of queries regarding sample size calculation for this article. StatCalc statistical calculators have long been a feature of CDC's Epi Info desktop software.ĩ. Allows the user to read and analyze locally-stored datasets.Ĩ. CDC does not collect any user information, personal or otherwise, when you use this mobile application.ħ. The app controls and facilitates user inputs by taking advantage of the iPad's touchscreen interface and using input devices such as sliders and steppers.Ħ. The materials embodied in the Epi Info™ Mobile Application are "as-is" and without warranty of any kind, express, implied or otherwise, including without limitation, any warranty of fitness for a particular purpose.ĥ. Allows the user to collect data on the mobile device using a form created with Epi Info 7 on a desktop PC.Ĥ. Allows the user to load a dataset of contacts of Viral Hemorrhagic Fever cases, select records from that dataset, enter follow-up information for a record, transmit the follow-up information to a master database via SMS, and save the follow-up information to the local data table.ģ. Government has been advised of the possibility of such loss, however caused and on any theory of liability, arising out of or in connection with the possession, use or performance of t.Ģ. In no event shall the Centers for Disease Control and Prevention (CDC) or the United States (U.S.) Government be liable to the user or to anyone else for any direct, special, incidental, indirect or consequential damages of any kind, or any damages whatsoever, including without limitation, loss of profit, loss of use, savings or revenue, loss of data or the claims of third parties, whether or not CDC or the U.S.
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