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Question 143 out of 3 pointsWhich of Mill's four canons suggests that there is an association between frequency of disease and the potency of a causative factor?Question 153 out of 3 points
Which of the following reasons might account for place variation in disease?Question 163 out of 3 pointsWhich of the following data sources is most likely to provide a representative sample of the general health status of a population?Question 173 out of 3 pointsCautious use of information from death certificates is warranted because:Question 183 out of 3 pointsBefore utilizing data for an epidemiologic study, the researcher must first consider the:Question 193 out of 3 pointsTrue or False? A case-control study is purely a descriptive (as opposed to analytic) study designQuestion 203 out of 3 pointsEcologic studies:Question 213 out of 3 pointsIn case-control studies, the odds ratio is used as an estimate of the relative risk. In order for this approximation to be reasonable, some conditions must be met. Which of the following conditions is not necessary in order to use the odds ratio to estimate the relative
risk?Question 223 out of 3 pointsAs an epidemiologist you are going to investigate the effect of a drug suspected of causing malformations in newborn infants when the drug in question is taken by pregnant women during the course of their pregnancies. As your sample you will use the next 200 single births occurring in a given hospital. For each birth a medication history will be takenfrom the new mother and from her doctor; in addition, you will review medical records to verify use of the drug. [N.B.: These mothers are considered to have been followed prospectively during the entire course of their pregnancies, because a complete and accurate record of drug use was maintained during pregnancy.]The resultant data are:Forty mothers have taken the suspected drug during their pregnancies. Of these mothers, 35 have delivered malformed infants. In addition, 10 other infants are born with malfunctions.Suppose that a relative risk of 0.5 has been found. Which interpretation might follow?