Apr-14-Ch15-20-stu [Compatibility Mode]

Apr-14-Ch15-20-stu [Compatibility Mode] - 4/13/2010 Welcome...

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4/13/2010 1 Welcome to BSCI425 Apr. 12, 2010 ± Announcements ± Gordis: Chapters 15 and 20 12/04/10 1 BSCI425 2010 @ S. Benson Announcements ± This Week: Chapters 14, 15 Chapter 20 (Today) ± Quiz today via clickers ± Thursday Project Time ± Questions? 12/04/10 BSCI425 2010 @ S. Benson 2 Criteria for Judgment 1. Temporal relationship 2. Strength of the association 3. Dose-response relationship 4 Replication of the finding 4. Replication of the findings 5. Biologic plausibility 6. Consideration of alternate explanations 7. Cessation of exposure 8. Consistency with other knowledge 9. Specificity of the association 12/04/10 BSCI425 2010 @ S. Benson 3 Confounding ± Associations resulting from unseen or unaccounted for factors ± What are some confounding factors ² Age ² Associated behaviors ² Smoking and birth weight 12/04/10 BSCI425 2010 @ S. Benson 4
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4/13/2010 2 Addressing Confounding ± In designing and carrying out the study: ² Individual matching ² Group matching It h l i fdt ± In the analysis of data: ² Stratification ² Adjustment 12/04/10 BSCI425 2010 @ S. Benson
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Apr-14-Ch15-20-stu [Compatibility Mode] - 4/13/2010 Welcome...

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