Posted: February 24th, 2017

# Calculate the appropriate measure of association and state in words what this number means (one sentence). Show calculations. (6 pts)

4. If there were no association between an exposure and disease, one would expect the following: (2 pts) A. Relative risk = 1.0 ; Proportion attributable risk = 1.0 B. Relative risk < 1.0 ; Proportion attributable risk < 50% C. Relative risk > 1.1; Proportion attributable risk > 50% D. Relative risk = 1.0; Proportion attributable risk = 0%

5. When a new treatment is developed which prevents death but does not result in the recovery from a non-infectious disease, which of the following will occur? (3 pts) A. Incidence of the disease will decrease B. Prevalence of the disease will increase C. Prevalence of the disease will decrease D. Both the incidence and the prevalence of the disease will increase

6. From January 1988 until March 1990 a research group in New Zealand followed 2,607 infants from the day they were born. Mothers were asked, “What position does your baby usually sleep in?” Mothers of 830 infants reported that their baby slept prone (on its stomach). Among this group, there were 9 infant deaths from Sudden Infant Death Syndrome (SIDS). The remaining 1,777 mothers reported that their baby slept on its side or its back. Among this group, there were 6 deaths from SIDS.

a. What type of study is this? (2 pts)

b. Construct a 2 x 2 table for these data. (4 pts)

c. Calculate the appropriate measure of association and state in words what this number means (one sentence). Show calculations. (6 pts)

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