Lec14ExperimentalStudies(Revised07)

Lec14ExperimentalStudies(Revised07) - Experimental Studies...

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Experimental Studies
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Types of Experimental Studies Multiple experimental groups Blinds single, double, triple
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Public Health & Clinical Objectives Modify natural history of disease and express disease prognosis Prevent or delay death or disability Improve health of patient or population Need to use best preventive or therapeutic measures Randomized trials are ideal design to evaluate effectiveness and side effects of new forms of intervention
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Historical Perspectives Sir Francis Galton (1883) - ruminated over the influence of prayer Joyce and Welldon (1965) found no benefit of prayer R. C. Byrd (1988) - suggested positive benefits Washington Post Parade article (2003) - also suggested positive benefits
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Recent Perspectives Effect of: coffee on CHD carotene on cancers hormonal therapy on breast cancer drug-lowering cholesterol on CHD
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Randomized Trials Historically, were done accidentally, in other words, “unplanned trials”
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This note was uploaded on 12/21/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Lec14ExperimentalStudies(Revised07) - Experimental Studies...

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