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Sometimes it can be useful to create a tally of the response to a series of questions. For example, some simple diagnostics tools tally responses to generate a preliminary diagnosis. The The easiest way to do this is to set the item values to a numeric value. For For example, if you have the question: " How How do you feel today?" The choices could be coded as:
In this case, maybe a higher score on several different questions could trigger the need to referral. You You would create a hidden value (i.e. /data#form/total_score) that sums the value of all the relevant questions. This will result in a numeric value.
A second hidden value (i.e. /data#form/preliminary_diagnosis) could help to interpret these values by using nested if statements to set the value of preliminary_diagnosis. For example, the calculation could read:
if(/data#form/total_score > 14, "high_risk", if(/data#form/total_score > 9, "monitor", "okay"))