To install ENA click on the following file ena.exe. After installation you can find an icon for the program on the desktop. Alternatively unzip the following ZIP file in a new directory and start ena.exe. Information for the updates can be found on the following website (last update October 15th, 2007) and the new beta version at www.nutrisurvey.net/ena_beta. The beta version is still under testing and should therefore only be used for training and to see the new functionality. For a french version of the software just copy the file language.dat into the ENA directory (with the right mouse button click on 'save target as', thanks to Gwenola Desplats for translating the file).
The program is thoroughly tested and the z-score calculation identical to other programs (EpiInfo, WHO Anthro) but if you should encounter any problems or if you have suggestions for further improvements please send an e-mail to firstname.lastname@example.org copied to email@example.com.
For background information and a detailed description on how to use the program please download the SMART methodology at www.smartmethodology.org. To do a reliable survey it is essential to work through this manual. In the manual the old name of the software 'NutriSurvey for SMART' is still used. We changed the name to reduce potential confusion with the general nutrition software NutriSurvey.
Description of ENA:
The ENA software has different sheets (planning, training, data
entry, results, options) which follows the steps of a survey. The most
important is the data entry sheet which opens after starting the software.
The anthropometric data is entered in the data table in the lower part
of the screen, partly checked for the validity and made as easy as possible
(e.g. entering the birthdate as 10199 instead of 1/1/1999). After entering
a value please press the Enter key to jump to the next column. When the end
of the row is reached or with the 'New' button a new data sentence is added
and depending on the settings under 'Options' the Surveydate, Cluster,
Team, ID and Household No. is filled out automatically. The results (z-score
for weight/age, height/age and weight/height) are directly displayed in
the panel on the upper left corner and automatically integrated into the
data table. If the results are outside the min/max range they are marked
with purple color (the range can be changed under the variable view). Besides
the standard variables additional variables can be added.
This is a typical example (file anthro.as in the directory of the software) of an anthropometric survey
The planning sheet enables the sample size calculation for an anthropometric or mortality rate survey. With the 'Table for cluster sampling' it is possible to assign the clusters (e.g. 1-30) to the geographical units (villages,..).
The following sheet is for the evaluation of the enumerators. Before a survey each enumerator should independently measure 10 children two times for weight and height. The software calculates the precision and accuracy and gives a comment on the results (if 10 children are not available a lower number may be taken).
Under the 'Extras' Menu a survey form can be printed which has a similar format as the data table
With the button 'Plausibility Check' it is possible to check the database for the most common problems and suggestions are given on how to solve them.
This part of the plausibility report shows that the standard deviation is relatively high (mostly caused by inaccurate measurements) and therefore the rate of malnutrition is higher than it would be with a normal standard deviation.
Under 'Results Anthropometry' the distribution of the anthropometric indices in comparison to the NCHS reference or the WHO standards is produced. Additionally it is possible to make bar graphs for the different z-score indicators and some variables (sex, cluster, age). In the right box the most important results of the survey are shown.
Click on the 'Report Excel' button to get a more detailed evaluation.
A formated report can be made automatically with the 'Report in Word' button. It contains the most important results in a nearly final format.
In the sheet 'Data Entry Mortality' the data for a mortality survey can be entered,
and evaluated in the sheet 'Results Mortality'.
Under 'Options' the settings of the software can be changed
The data can also be easily transfered to Excel and pasted back to ENA. From Excel it is very easy to transfer the data into other programs e.g. EPI Info which has a simple import function for Lotus (*.wks) files which makes it possible to do special statistical calculations.