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Epi Info's Nutrition Program, NutStat.
Epi Info 2002 is an epidemiological software program. The software is downloaded onto a personal computer for public use. With it users can develop a survey for use in the field. There are several important features of the software program that are helpful to public health nutritionists. One such feature is a nutrition anthropometry program known as Nutstat.
With Epi Info 2002 on your computer, you can use Nutstat to enter aggregate data on age, sex, height and weight as a spreadsheet, or individually on to the Nutstat screen as it is collected, and analyze the data. Additional statistics including percentiles and z-scores for height, weight, head circumference, as well as BMI, and BMI-for-age can be generated. Nutstat compares the entered data with the data set developed to generate the revised CDC growth charts. To download Epi Info 2002 and to link to SAS code for calculating percentiles and Z-scores, click on the following links:
Development of Electronic Growth Charts for state public health offices and WIC programs.
The Nutstat anthropometry module of EPI-INFO was written in the Visual Basic programming language. The original source code is available to incorporate into system upgrades. A zipped file including the Nutstat Files with the dynamic link libraries (suffix .dll) and an Access file with the CDC growth chart data set, along with instructions for implementation, will be provided on request to state public health offices for use in WIC system upgrades. Winzip or another reader will be required to access the zipped file. To request the file containing the source code and instructions, email your request to COR4@CDC.gov..
Once the source code is provided to a third party for use, CDC cannot be responsible for or ensure the accuracy of its calculations. Please use at your own risk. Once incorporated into a systems upgrade, validation of calculations should be performed using SAS software (link provided above) or by mathematical formula, each of which is located on the CDC growth charts web site at www.CDC.gov/growthcharts. The mathematical formula is located on the page under the "data tables" section and uses LMS parameters to calculate percentiles. The LMS parameters are the median (M), the generalized coefficient of variation (S), and the power in the Box-Cox transformation (L).
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