DATA COLLECTION 5/1/17

Question 1

Which variables do you need to collect data for? (3)

Answer 1

1. exposure
2. outcome
3. co-variates

= variables affecting the exposure/outcome

Question 2

What variables are relevant (4)

Answer 2

1. confounder
   - affects both exposure and outcome
2. mediator
   - in between the exposure and outcome
3. outcome
4. competing exposure
   - affects outcome

Question 3

What does the cross tab approach become relevant? (3)

Answer 3

• helps to draw a full DAG easily
• uses arrows to see if one variable causes another
• no causal relationship you indicate O