The purpose of a pre-test discussion is to establish informed consent. For HIV testing, obtaining informed consent is the same as for any other diagnostic test or treatment. As with other diagnostic tests, if the pretest probability of a positive result is high, more extensive discussion may be warranted. See: BCCDC Communicable Disease Control Manual Chapter 5 – Section II – HIV/AIDS. If a patient declines an HIV test, the reason for refusing the test should be explored to ensure it is not due to false information about HIV infection or the consequences of testing.