data collection part 1 of 4

Question 1

what are the 3 key steps for data collection

Answer 1

Deciding which variables you (might) need to collect
- which variables MIGHT be required
- which variables ARE important to the question
Consider where to source your variables.
Choose between different sources of the same variable.

Question 2

what variables need to be collected in a analytical study

Answer 2

exposure
outcome
covariates

Question 3

what study type removes the need for covariates

Answer 3

RCT

Question 4

Define covariate

Answer 4

variables that effect the exposure or outcome.

Question 5

what 3 questions are asked to determine the covariates

Answer 5

what are the likely causes of the exposure
what are the likely causes of the outcome
what are caused by the exposure

Question 6

Define mediator

Answer 6

covariate which is part of the causal pathway

Question 7

Define confounder

Answer 7

variable which causes both the exposure and the outcome

Question 8

Define competing exposure

Answer 8

a variable which affects the outcome.

Question 9

what are the 3 lists and which type of variable does each include

Answer 9

1) variables causing the exposure- confounder
2) variable causing the outcome- confounder, mediator, competing variable
3) variable caused by the exposure- mediator.

Question 10

what are the cross tab and DAG used for

Answer 10

determine which variables are relevant.

Question 11

define DAG

Answer 11

Directed cyclical graphs

Have direction, can only go in that direction.