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Medical Statistics
Question | Answer |
---|---|
Hazard rate is also known as | Incidence rate |
2 point definition of Hazard (incidence) rate | -density function of events during interval delta-t -Events per person-years |
Define person-years (PY) | (n at rist)*delta-t |
2 point definition of Relative Risk | -defined time period -risk exposed/ risk control |
What do outcomes >1< mean in RR ? | - >1= there is a risk - =1 there is no risk - <1= it has a protecting factor |
Define Risk difference | Risk exposed- risk control in a defined time period. Het gaat om 'n absouluut risico ! |
What do outcomes that are negative mean in Risk difference | -When the outcome is negative the factor in the exposed group is protective -When the outcome is positive there's a risk factor involved in the exposed group. |
Define Absolute risk reduction | Het omgekeerde v Risk difference; control- exposed |
Define Numbers-needed-to-treat | number u need to treat to avoid one extra event in a defined time period |