Referencing a select_* variable gives the values and not the labels. You would have to use jr:choice-name(${variable}, 'value') for each of the values you’d want to retrieve the correct choice label.
E.g
if(selected(${delivery_complications}, 'xyz'), jr:choice-name(${delivery_complications}, 'xyz') would give the choice label associated with value ‘xyz’.
Here’s a link to the odk spec on jr:choice-name