Read the following study, construct the appropriate 2x2 table, calculate the measure of association, state the study design, and state the interpretation of the results.An outbreak of listeriosis is occurring in Michigan. The cases are sporadic and not linked to a common group or event. Preliminary reports suggest an association of illness with pre-packaged salads. Investigators identified cases by hospital and laboratory reports. Interviews were conducted on 60 patients found with laboratory confirmed listeriosis and 90 well people from randomly selected households. Case-patients and well people were similar with respect to age, sex, and level of education. Forty-five (45) people with listeriosis reported consuming pre-packaged salad. Nine (19) well people reported consuming pre-packaged salad. 2x2 table + - Total + A B A+B - C D C+D Total A+C B+D A+B+C+D List the values for each cell: A, B, C, D, A+B, C+D, A+C, B+D, A+B+C+D Calculate the Odds Ratio (show your work) State your interpretation What type of study design is this?

Read the following study, construct the appropriate 2x2 table, calculate the measure of association, state the study design, and state the interpretation of the results.An outbreak of listeriosis is occurring in Michigan. The cases are sporadic and not linked to a common group or event. Preliminary reports suggest an association of illness with pre-packaged salads. Investigators identified cases by hospital and laboratory reports. Interviews were conducted on 60 patients found with laboratory confirmed listeriosis and 90 well people from randomly selected households. Case-patients and well people were similar with respect to age, sex, and level of education. Forty-five (45) people with listeriosis reported consuming pre-packaged salad. Nine (19) well people reported consuming pre-packaged salad. 2x2 table + - Total + A B A+B - C D C+D Total A+C B+D A+B+C+D List the values for each cell: A, B, C, D, A+B, C+D, A+C, B+D, A+B+C+D Calculate the Odds Ratio (show your work) State your interpretation What type of study design is this?

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