This page will walk through an example of setting up a form to calculate a z-score based on a age in months, gender, and weight.
First, upload the following z-score table using the the Manage Lookup Tables page. This table covers children between 0 and 60 months of age, but you can modify the table as needed for your project.
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Note: this calculation uses case properties named "gender", "weight", and "age." If you have named your case properties something else, you will need to change the reference above to the same name as your case properties.
This hidden value will be -3, -2, -1, or 0 which corresponds to the child being more than -3, -2 and -1 standard deviations from the mean. You can then use this hidden value for further calculations or display it back to the user.