ANTC67H3 Lecture Notes - Lecture 8: Logistic Regression, Chi-Squared Distribution, Odds Ratio
Document Summary
Kahn, h intro to epidemiologic methods 1985 readings for today"s class. Going to make challenging part a bonus. Formula and source: or calculator (refer to powerpoint slides posted oct 30 complications ) Effect modification: is a little more informative, we can conceive of this as saying there is a relationship between a and b. Categories such as age groups are what we refer to as strata or levels. Relationship of a and b changes depending on which level or strata you are operating on. i. e smoking when you are 50 as opposed to being 15. Strata could be age (physiological), sociological, you can have different strata with different ethnicities (can be testing intrinsically genetics or diets) Effect modification is a really good tool to see if the relationship between a and be stay constant. Slide 4: i. e. primary risk factor for having a heart attack is hypertension. Null hyp: no association between blood pressure and heart attack.
