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Medical Statistics

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
Created by: SavageMD