GLOSSARY
Absolute risk increase
The absolute arithmetic difference in risk of harmful outcomes between experimental groups (experimental group risk, or EGR) and control groups...
Continue readingThe absolute arithmetic difference in risk of harmful outcomes between experimental groups (experimental group risk, or EGR) and control groups (control group risk, or CGR), calculated as risk of harmful outcome in experimental group minus rate of harmful outcome in control group (EGR – CGR). Typically used to describe a harmful exposure or intervention (eg, if the rate of adverse outcomes is 20% in treatment and 10% in control, the absolute risk increase would be 10% expressed as a percentage and 0.10 expressed as a proportion). See also
Absolute risk reduction;
Number needed to harm.