The variable is Abdominal pain (AP).
In the questionnaire the patient MUST actively mark if he/she has AP - cannot do it by simple omission of a AP input. Then if they mark that they have AP, further inputs are to open up (individually) such as site of AP, severity of AP, Characteristics of AP, Radiation of AP, Trigger to AP & so (each with 10 or so variables).
However, if I pick No AP can the AP toggle be blocked or hidden and vice versa so that both cannot be picked?
Because it is a questionnaire it needs to be super easy and tick boxes only preferable.