null hypothesis – in a study this sometimes just refers to the hypothesis, but more specifically it refers the idea that any difference between 2 study groups has only occurred by chance.
Glossary
Selected words and phrases
substitution therapy – using a prescription drug, eg methadone or buprenorphine, to stop using heroin.
portal hypertension – increased blood pressure (hypertension) in the vein carrying blood to the liver.
wild-type virus – HIV that has no drug resistance mutations.
This is usually the virus that you were first infected with. However, approximately 10% of people who are diagnosed with HIV in the UK are likely to already have resistance to one or more HIV drugs.
This is called transmitted drug resistance. This is also why everyone diagnosed with HIV should also have a resistance tests.
Rates of transmitted drug resistance vary in different countries.
HBV – hepatitis B, a virus that causes liver disease.