Event, population and time
A risk measure must state which event is counted, among whom and over what period. Risk of diagnosis and risk of death address different questions. Without a time horizon, percentages may appear comparable when they are not.
A communication example
In a hypothetical example, risks of 4 in 100 and 2 in 100 over the same period differ by 2 percentage points. The relative comparison is different: the second risk is half the first. Presenting both formats helps show magnitude.
Reading comparisons
Check compatible follow-up and definitions, and whether estimates come from observation or a model. Include confidence intervals and context. A tool can calculate differences but cannot decide whether the comparison supports causal interpretation.
Interpretation limits
The example numbers are illustrative and do not represent a cancer, treatment or person.
Original references
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Research questions
Select tools by method, population and purpose. A thematic connection does not validate use in every case.
Educational content for framing research. Consult the original document, study population and methodology before interpreting a conclusion. Methodology