In a case-control study of ovarian cancer and past diet, cases and controls were
ID: 3359498 • Letter: I
Question
In a case-control study of ovarian cancer and past diet, cases and controls were matched for age, reproductive history, and social class. The results of the study indicate that cases and controls differed significantly regarding past animal fat intake, use of birth control pills, and use of alcohol. Which of the following CANNOT be cited as a likely factor that would account for or explain the differences observed?
Age
Reproductive history
Social class
All of the above
A.Age
B.Reproductive history
C.Social class
D.All of the above
Explanation / Answer
Here we are given that the results of the study indicate that cases and controls differed significantly regarding past animal fat intake, use of birth control pills, and use of alcohol, therefore there is no dependence on the age, reproductive history or the social class as a factor causing ovarian cancer, therefore none of these factors are relevant here.
Therefore D) all of the above is the correct answer here.