Introduction to Case-Control Study Design Flashcards
1
Q
What is a case-control study?
A
Identify cases; Identify non-cases
Ascertain previous exposure of everyone
2
Q
Why are cohort studies not useful for examining rare conditions?
A
A very large sample would be needed to identify potential rare conditions
e.g. examine all women given pethidine during labour to identify few cases of children with leukaemia
3
Q
Why are case-control studies usually favoured over cohort stuides?
A
Short duration
Uses patient recall / records
4
Q
Draw the table used as a template to calcualte an odds ratio
A
