Tagged Questions
7
votes
1answer
166 views
Is it possible to have a variable that acts as both an effect modifier and a confounder?
Is it possible to have a variable that acts as both an effect (measurement) modifier and a confounder for a given pair of risk-outcome associations?
I'm still a little unsure of the distinction. I've ...
6
votes
3answers
161 views
What to conclude when you fail to find an association in an epidemiological study?
Normally when somebody finds an association in an epidemiological study people are quick to point out that it doesn't prove causality, that there are problems of missing co-founders, that it is at ...
2
votes
1answer
159 views
Does control get us closer to or farther from causation?
In logistic regression with an N of 40,000, purchase decision is unrelated to price. However, with certain demographic variables controlled, price can show a positive coefficient of meaningful ...
