Introduction to Case-Control Study Design Flashcards
What is analytical epidemiology?
Comparison with another group
What are the 3 types of observational studies?
Cross-sectional surveys, cohort studies, case-control studies
What is a case-control study?
Case vs control group – looked back upon – exposed or unexposed? – compare level of exposure in cases/controls
What is a cross-sectional survey?
data collected from a population, or a representative subset, at a specific point in time
What problems are present during a case-control study?
Selection bias, information bias, confounding
What is selection bias?
Where cases are not representative of the population from which the cases came
What is information bias?
Either non-differentiated misclassification (randomly inaccurate measurement) or systemic misclassification (recall bias, assessor bias, data collection differ)
How can confounding factors be addressed?
Minimised in selection (matching confounders), adjusted for in analysis
Why chose matching vs adjusting in regards to addressing confounding?
Matching = large. Adjusting = making like for like comparison
