2 Study Designs Flashcards
What is the AAAA framework?
Assess - what type of study?
Access - where is the best evidence?
Appraise - quality of evidence
Act - is this relevant to my clinical practice?
Who made the link between Thalidomide and congenital defects?
Lenz and McBride in 1961
What study would you use to answer a frequency of disease who is affected question?
ecological; cross section
What study would you use to answer an aetiology / risk factor question?
case - control or cohort study
What study would you use to answer an effectiveness question?
RCT
What study would you use to answer a diagnosis question?
special cross sectional
test accuracy study
What study would you use to answer a patient experience question?
qualitative study
What is a case report study?
a detailed report of an unusual ‘condition’ or ‘uccurence’ in a single moment
What is a case series?
a detailed reoport of an unusual ‘condition’ or occurrence in several practices
What is a cross-sectional study?
information is collected (planned), in a defined population at one point in time
What is an ecological sudy?
information is collected from population groups to compare disease frequencies
What are the two different ways that data could be collected in an ecological study/
in the same population but at different points in time
between different populations at the same point in time
What are the sub-divisions of studies?
descriptive anatlytical (observational or interventional)
Name the 4 types of descriptive sudies
case report
case series
cross-sectional study
ecological study
What are the characteristics of descriptive studies
observational
often precede analytic studies investigating disease in aetiology
