The design is as follows:
Outcome
positive (cases) | negative (controls) | |
exposure | a | b |
non-exposure | c | d |
The direction of enquiry may be drawn thus:
Cause <-----------------------------Effect
i.e. the study starts the effect (e.g. a disease) and tries to look back to find the cause(s).
Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.