The goal is to have screen readers read the common label for the group, the label for the radiobutton group and the label for the current choice, when that choice receives focus. In this example "In the last two years have you: Seen your doctor about Aids yes radiobutton" for the first tab stop on the page.
Using ARIA group of radiobutton fieldsets.
In the last two years, have you:
Results
Jaws:
With IE: Only reads legend of current fieldset and label of current radiobutton.