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OHSE3620 Epidemiology And Environmental Health

tag 0 Download 4 Pages / 879 Words tag 19-07-2021

Question:

(a) What is the advantage of using a matched case-control design compared to an unmatched case-control design (b) What variables were matched
How was information about exposures obtained in the case-control design
What is the main advantage of having broader definition of the outcome in the cohort study compared to the case-control study.
(a) Give the formula for estimating the total number of HUS cases caused by eating contaminated sprouts in restaurant K during the study period.
(b) If the total number of main dishes served containing contaminated sprouts was 120 and the attack rate among sprout eaters was 30%, what is the estimated number of HUS cases
What is the meaning of (a) attack rate among sprout eaters and (b) attack rate for subjects fulfilling case definition. If sprouts are the contaminated source, which attack rate would you expect to be (a) How is the exposure-outcome association expressed for the case-control study analysis
 
Which food item in Table 1 is the most likely contaminated source, why
(c) Express the association between consuming that food item and the chance of getting HUS in simple language. (d) What is the importance of also reporting the 95% CI How is the exposure-outcome association expressed for the cohort study analysis.
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