This natural frequency tree will guide you to assess the reliability of such quick tests. Scientists assume that only 1 out of 13 people with a positive HIV self-test result are actually infected – 12 would thus be wrongly alarmed. With our frequency tree, you can see for yourself how reliable such an HIV self-test is.
Interpreting HIV quick tests
English, German
Conditional probabilities, Health, Natural frequencies
Harding Center for Risk Literacy