Question

37. You just read a study that revealed an association between liver cancer and exp chemicals in the workplace. They examined people with liver cancer and peo cancer and asked where they worked, how long they had worked at their place what possible chemicals they may have been exposed to. You decided this w a. cohort study c. expe b. case control study d. quas 38. You also remembered that one of the cons of this type of design was: a. that it was good for studying rare diseases b. that you didn't have to expose anyone to harmful products c. that it relies on recall to determine exposure d. that you need a large sample size or longer follow up 39. Ensuring a valid study is most often determined at what stage of the study? a. The design stage b. The analysis stage c. The interpretation stage 40. How can confounding be controlled at the design level of a case-control stuč a) Matching b. Multiple regression

Answer 1

37.Ans : b Case control study

Explanation :The case control study deals with frequency and amount of exposure in patients with a specific disease and find the association also.

38. C

Explanation : They are subject to selection bias and do not allow calculation of incidence. They look into data from the past.

39.C interpretation stage

Explanation :whether the study actually measured the key concepts in the study or not.

40.Ans: a

Explanation : Confounder is a vadiable whose presenve affect the variables being studied. Randomization and restriction also helps in preventing it.