Cancer & Oncology

Objective response rate

Also called: ORR

What does Objective response rate mean?

The proportion of study participants whose tumours shrink by a predefined amount.

U.S. National Library of Medicine
Understanding Medical Words ↗ National Cancer Institute
Cancer Terms Dictionary ↗ CDC
Vaccine Glossary ↗

This is a plain-language Healthway explanation, not an individual diagnosis. The meaning of a term can change with the clinical context in which it appears.