Revision class 1 Thomas Abraham

Hazard ratio: compares events in one group, with those in another group Deaths among those who eat more red meat, compared to deaths among those who eat less red meat Hazard ratios and relative risk ratios, can be read similarly, though they are technically different

Understanding risk figures By eating more red meat, I increase my risk of death from cancer and CVD by 20% But even if I do not eat red meat, I still have a risk of getting cancer (absolute risk).

At my age, I have a 10% chance of developing cancer or cvd ( absolute or baseline risk) If I eat a lot of red meat, I increase this by 20%. (Relative risk increase) Absolute risk increase 10%+ 2%(20% of 10)= 12% I still have an 88% chance of not developing cancer/cvd

How to report? Ask for absolute risk reduction figures, or baseline risk figures.. They help readers get a much better understanding of how big the risk is and how important the findings are.

ps-for-understanding-studies/absolute-vs- relative-risk/ ps-for-understanding-studies/absolute-vs- relative-risk/ guides/communicating-statistics-and- risk.html guides/communicating-statistics-and- risk.html

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