A cross-sectional study examined children between the ages of 1 and 17 to determine the prevalence...

A cross-sectional study examined children between the ages of 1 and 17 to determine the prevalence of asthma and of indoor environmental risk factors for childhood asthma. Data was collected by questionnaires, which were completed by each child's primary caretaker. Having a smoker in the household was found to be a significant risk factor for childhood asthma. The following 2X2 table illustrates the study findings related to this risk factor.

		Outcome
Exposure		Asthma	No Asthma	Total
	Smoker in the household	478	1156	1634
	No smoker in the household	350	1235	1585
	Total	828	2391	3219

Calculate the prevalence ratio or prevalence rate ratio (PR) for having a smoker in the household (Hint: exposure). (3 points)
Let’s assume the PR calculated above is X. Which of the following is/are a correct interpretation(s)? (Check all that apply). (3 points)

☐ The odds of children with asthma is X-fold as great if a child has a smoker in the house.

☐ The proportion of children with a smoker in the household is X-fold as great if a child has asthma.

☐ The proportion of children with asthma is X-fold as great if a child has a smoker in the household than those who live without smokers.

☐ The odds of children with asthma is X-fold as common if a child smokes in the house when compared to those who do not smoke in the house.

☐ The proportion of children with asthma is X-fold as common if a child lives with a smoker in the house when compared to those who live without one.

☐ Children who have asthma have X times the rate of having a smoker in the household than those who do not have asthma

Solutions

Expert Solution

The prevalence ratio(PR) is analogous to the risk ratio of cohort study.

ekkarill92 answered 1 year ago

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