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Epidemiology Studies (Timeline (Present (Cross-sectional studies (deal…
Epidemiology Studies
Timeline
Present
Cross-sectional studies (deal with what information you have now)
Further
Cohort studies (do studies for the next 10-20 years)
Past
case control studies (dig up the past)
Epi Study Design
(FYP) Observational : observe and not do anything to the subject
Descriptive : Describing
e.g. This individual eats 10 bananas per day
Case reports (document as much details)
Cross-sectional studies ("one point" , representative view, snapshot, collect data once per subject)
Analytical : Analysis
e.g. Why the individual eat so much banana, maybe she has a banana tree near her house
Case-control
Cohort studies
Experimental : you manipulate (do something to) the subjects
Clinical trials
Testing new drugs on humans
Randomised Control Trials (RCT)
Recruit the subject, split into half. One half will be on the trial, the other half is the control (not doing anything)
Factors affecting RESULTS
Sampling
Randomisation (equal chance & fair)
Simple
Block
Systematic
Stratified
Bias
Selection
Information
e.g. recall bias, reporting bias
Confounding