Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  • Health Research Authority (HRA)

    An NHS organisation established to protect and promote the interests of patients and the public in health research. The National Research Ethics Service (NRES) is now part of the HRA.

  • Hypothesis

    In a trial, a statement relating to the possible different effect of the interventions on an outcome. The null hypothesis of no such effect is amenable to explicit statistical evaluation by a hypothesis test, which generates a P value.