Calculate based on respondent selection (composite index)

OK, in this case you could do the same as outlined in the image shared below:

In the survey tab of your xlsform:

In the choices tab of your xlsform:

Image 2

Data entry screen as seen in Enketo: Mild

Data entry screen as seen in Enketo: Mild

Data entry screen as seen in Enketo: Severe

Data entry screen as seen in Enketo: Severe

Data entry screen as seen in Enketo: Very Severe

Reference xlsform:

Composite Index.xlsx (13.4 KB)