Tuesday - Logistics regression analysis
12 important questions on Tuesday - Logistics regression analysis
When can you use 2x2 tables?
How do you calculate the odds ratio (OR)?
But! Total number of people is not needed as it cancels out: OR = 102*2058 / 153*839
Why is it possible to calculate the odds ratio in a case-control study and not the relative risk?
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How do you calculate probability from odds?
Which number is associated with no relation in odds?
So, if there is no relationship 1 is in the confidence interval
What is the difference between linear regression and logistic regression?
What is the formula for logistic models?
--> not valid in case control study!!!
The logistic model can also be defined in terms of odds, what is this equation?
How can exp(a+b) also be written?
When is the logistic model not valid?
What are the assumptions of logistic models?
- observations independent
- residuals random
- x can be measured without error
What is the formula to calculate the 95% CI of ß and of the odds ratio?
CI(OR) = exp(CIß)
The question on the page originate from the summary of the following study material:
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