EPID 301 Lecture Notes - Lecture 2: Birth Weight, Health Professional
Document Summary
Week 2 lecture 2 september 19, 2017. How to measure users and outcome: outcome can be something such as dying from heart retention, factor of cause of death, measurement of outcome can be done through surveys (mortality data) Why do we standardize the mortality rate: standardization helps control for different variables across populations, examples, lifestyle and diet between different populations, direct standardization is more common than indirect, census = whole population, survey = sample of population. Stroke symptoms occur from the loss of oxygen (from blockage (ischemic stroke) /rupture (hemorrhagic stroke) Hospital records - accurate count of severe strokes: mild strokes are likely to go undiagnosed due to lack of immediate/severe symptoms. Therefore, the mild end of the stroke spectrum will be an error in the prevalence/incidence. Death certificates - may account for silent strokes, likely to be diagnosed by autopsy in a developed country like canada.