Regression

Question 1

What is linear regression used for?

Answer 1

Estimating mean differences between groups (Single continuous variable)

Question 2

What is logistic regression used for?

Answer 2

Binary outcomes, models odds ratio

Question 3

What 2 things can regression be used for?

Answer 3

1) Make future predictions/prognoses –> Look at multiple factors
2) Understand how treatment or disease works

Question 4

Describe what y= a + bx stands for?

Answer 4

Y: Outcome, B: Main interest, X is predictor and A: Intercept

Question 5

What is the benefit of multiple regression?

Answer 5

Incorporate additional variables (But accounts for confounders)

Question 6

What are categorical variables used for in regression?

Answer 6

Predictors

Question 7

Why is regression ultimately used?

Answer 7

Correlations don’t give full account of relationships between variables (Uncover story behind data)

Question 8

How do studies or trials analyse their results?

Answer 8

Produce a regression model as main analysis for study, and recognise multiple predictors can effect results