HI all,
The TA's and I reviewed this again today and offer the following further clarification for what we are asking for in question 3:
An equivalent interpretation of what we are asking in q3a is: “Among hypertensive women, what is the proportion of stroke cases that is attributable to OC use?"
For 3b,: “Among OC users, how much of stroke cases is attributable to hypertension?”
In 3c, we’d like you to compute how much of stroke is attributable to the interaction of hypertension and OC use, then contrast this with what you found in a and b.
hope this helps,
JMC