15. Cohort study Exposed Disease Future Now Not Exposed No Disease Disease No Disease Association Historical data Concurrent data 1970 2005 2010 2005 2010
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17. Cohort study Disease (+) Exposed (+) Exposed (-) Disease (-) Total Incidence rate of disease a b c d a + b c + d a/a+b c/c+d
18. Case control study Exposed Disease In the past Now No disease Not Exposed Exposed Not Exposed Case Control Non-randomized
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21. Case control study Disease (+) Exposed (+) Exposed (-) Disease (-) Total a b c d a + b c + d Odd ratio = a/a+c = ad b/b+d bc Proportion of exposed a a+c b b+d
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26. Summary Design depends on research Q Treatment efficacy/safety – RCT Diagnostic methods – x section Prognosis- outcome - cohort Agreement measurement – X sectional Classification - cohort (outcome), X section (criteria)
Notes de l'éditeur
Question – what r the study designs you know of?
Research question will be followed desc by my colleague
For this session we will discuss some of the most commonly used study designs
More than 2 contacts regular interval but can vary from weeks, months, year Longer period Info gathered each time is identical Data from Same study population but NOT necessary same respondent
