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Data Analysis and Interpretation.ppt

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Data Analysis & Interpretation Why do we see conflicting results in studies? ã Results and inferences are dependent on the study design, ã Method of selection of subjects for the study, ã Size of the sample used for the study, ã Conduct of study. Study Design The aim of study design is: ã to maximise attribution (inferences), ã to minimise all sources of error, ã to be practical. Factor to be aware of .. ã Bias – source: systematic error, ã Confoundings – sourc
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  Data Analysis & Interpretation  Why do we see conflicting results in studies? ã Results and inferences are dependent on the study design, ã Method of selection of subjects for the study, ã Size of the sample used for the study, ã Conduct of study.  Study Design The aim of study design is: ã to maximise attribution (inferences), ã to minimise all sources of error, ã to be practical.  Factor to be aware of .. ã Bias  –  source: systematic error, ã Confoundings  –  source: a variable which is associated with both exposure (intervention) and outcome, ã Chance  –  source: random error.
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