To do a reliable
survey it is essential to work through this manual. It contains
a section for the ENA software but it has not yet been
updated to reflect the changes which we did in the last years. The manual also uses the old name of the software
('NutriSurvey for SMART'). We changed the name of the program to reduce
potential confusion with the general nutrition software NutriSurvey.

**"Population Nutritional Status During Famine" Michael Golden and Yvonne
Grellety, 2002**

This work was started to examine the mathematical changes
that occur in the distribution of wasting as populations came under stress. It
came as a surprise to find that there was no change in the distribution during
stress. And that the distribution remained Gaussian. This has major
implications. One of which is that the prevalence of wasting can be calculated
mathematically from the data, this gives a much more accurate estimate as the
actual numerical data collected are used, instead of just whether the
individuals are above or below a cut off point. These calculations are
incorporated into ENA software. As children that have been measured
inaccurately tend to be in the tails of the distribution, this can inflate the
number counted below a cut-off point. It may be much more reliable to look at
the calculated rather than the counted prevalence, particularly when the numbers
are small (ie with SAM).