Analytic Epidemiology PT2
Analytic Epidemiology PT2 Using a computer software program, the epidemiologists have analyzed the food history data from the questionnaires and have constructed the following attack rate table. TABLE IS ATTACHED AS A PDF • Calculate the relative risk for each of the food items. • Identify the food items that have a statistically significant confidence interval. • Identify the food item that is the most likely source of transmission. Explain. To identify the contaminated food item you need to identify the food items that have significant confidence intervals and pick the food with the highest relative risk. For more information, refer to "Interpretation of Odds Ratios and Relative Risk" on the Module homepage. Assignment Expectations, in order to earn full credit: Please write your paper in your own words. That is the only way I can evaluate your level of understanding. Quotes are rarely needed; if necessary, they should comprise less than 10% of a paper and must be properly cited. Even though the papers must be written in your own words, you are required to cite sources for any statement of fact or idea that is not common knowledge. You must cite the sources within the body of the paper and include a reference list at the end of the paper. Note: Wikipedia is not an acceptable source of information. Use credible, professional, and scholarly sources such as journal articles from ProQuest or EBSCO, and government, university, or nonprofit organizations’ Web sites. You must clearly show that you have read the module homepage and the required background materials. You are welcome to do research in addition to -- but not instead of -- the required readings. Your papers will be evaluated on the following factors: • References - citations are used within the body of the paper any time you state a fact or idea that is not common knowledge. A reference list is included at the end of the paper. • Precision - you follow all instructions and you answer each part of the assignment. • Breadth - you show broad knowledge of the module’s topic. • Depth - you go into detail to show more critical thought about the specific tasks or questions in the assignment. • Clarity - the extent to which you elaborate and include discussion or examples as asked. • Application - the extent to which you apply the information to a real-life situation related to the assignment, if asked. Before you begin, please review this information about When to Cite Sources http://www(dot)princeton(dot)edu/pr/pub/integrity/pages/cite/ Other resources are available at http://owl(dot)english(dot)purdue(dot)edu/owl/resource/560/02/
Analytic_Epidemiology_PT2.pdf
Analytical Epidemiology PT 2
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Relative risk measures the risk of events happening when comparing one group to another typically the exposed group versus the control / non-exposed group (Timmreck, 2002) & (Smithson, 2003). The relative risk is a measure of association and merely determines chance and as such, it is a risk ratio (Timmreck, 2002). Mathematically the relative risk is equal to (a / (a+b)) / (c / (c+d)) where a represents number of positive outcome in exposed group, b is the number negative outcomes in the exposed group while c is number of positive outcomes in the control group and d is the number negative outcomes in the control group.
Chicken= 55% / 12%= 4.6
Potato salad= 44% / 29% = 1.5
Potato chips= 83% / 26% = 3.1
Ice cream =100%/ 24%=4.8
Pie=89% / 13%=6.8
Pepsi= 47%/ 17% =2.8
Chicken, potato chips, ice cream, and pie have statistically significant confidence intervals, but potato salad and Pepsi do not attain the threshold. The significance of the ...