PUBH 1001 Lecture Notes - Lecture 4: Relative Risk, Optimism Bias, Cardiovascular Disease
Document Summary
Independent variable - antecedent variables, unchanged by other factors, predictors of an outcome. Dependent variable - consequential condition, affected by other factors, the outcome of the study. Rate = # health events/population at risk x10n: most of the time its to the 5th or 3rd (1 per 100,000 or 1000) Health events: new (incident) or existing (prevalent) cases. Complicated when it could be new and existing cases. Sudden deaths are new (incident) cases (cardiac disease) Population at risk (par: people who share a characteristic that makes them susceptible to a particular health event. Important crude rates: crude birth rate: # live births during time period/total population at mid- point of time period x100,000, crude death rate: # deaths during time period/total population at mid-point. 2009 - 1351 births per 100,000 par of time period x 100,000. 2009 - 4 million - 2. 5 million = +1. 5 million people: crude population change: # births - # deaths.
