In QlikView there is something called AND-mode which is meant for the purpose you are describing. A list box is default in an OR-mode but can be toggled into an AND-mode in it's properties dialog under certain conditions.
Patient table houses the Patient_Key field I am after, and it is joined to a table called RiskFactors which has two fields, Patient_ID and RiskFactor. PatientID is also in the Patient table so that is how they are joined.
With the AND-mode listbox you will not need the alternate states as you select all the risk factors from a single list box.
You multi-select by holding the CTRL-key down while clicking. You will see that the other possible selections will be in white and if these are not to be considered for the final selected patient you will have to turn them into NOT selections that have the ! and red background as an indicator. Read more about that in the links I gave you previously.
Thanks for this approach but this doesnt really solve the question. I need a way to select the population in the default/current state, based on selections made in other states.
The example I listed is a simplified version of what I am doing in the application and many things are relying on the different states. The thing that will make what I built truly useful is being able to make this selection.