relative risk
Compares the risk of outcomes in the exposed and control groups.
symbols, variables and units
a,b: The number of people with/without outcome in the exposure group; c,d: The number of people with/without outcome in the control group.
applicable conditions and boundaries
Risk is estimable in cohort or trial; unadjusted RR does not imply causality.
formula source code
The following is a copyable LaTeX expression.
RR=\frac{a/(a+b)}{c/(c+d)}Reference and Extended Learning
CDC · Principles of Epidemiology ↗is organized according to model definition and assumptions. Please check actual conditions and original literature before engineering, research and clinical use.
relative riskEpidemiology