Module 4 Quiz

Calculate the age-specific rate for violent deaths in 2007 per 1,000 for Youngstown based on the data appearing in question 5, then match the correct rate with the correct age-strata. 20-29 years of age

17.1 per 1000 per year

Calculate the age-specific rate for violent deaths in 2007 per 1,000 for Oldenville based on the data appearing in question 5, then match the correct rate with the correct age-strata. less than 20 years of age

17.4 per 1000 per year

Calculate the age-specific rate for violent deaths in 2007 per 1,000 for Youngstown based on the data appearing in question 5, then match the correct rate with the correct age-strata. 30-39 years of age

4.5 per 1000 per year

Calculate the age-specific rate for violent deaths in 2007 per 1,000 for Oldenville based on the data appearing in question 5, then match the correct rate with the correct age-strata. 30-39 years of age

4.7 per 1000 per year

Calculate the age-specific rate for violent deaths in 2007 per 1,000 for Youngstown based on the data appearing in question 5, then match the correct rate with the correct age-strata. less than 20 years of age

41.2 per 1000 per year

Calculate the age-specific rate for violent deaths in 2007 per 1,000 for Oldenville based on the data appearing in question 5, then match the correct rate with the correct age-strata. 20-29 years of age

8.4 per 1000 per year

Based on your answers for age-specific rates in both cities, which of the following statements are correct?

A and C only In 2007, death rates are higher in the <20 years of age groups when compared to those aged 20-29 in both cities. In 2007, death rates are higher for individuals 20-29 years of age in Youngstown when compared to Oldenville.

Which of the following is a hypothetical (i.e., not real) rate?

Age-adjusted rates ('standardized')

It's fine to compare age-adjusted rates that were calculated using different standard populations.

False

After adjusting for age, the death rate in Youngstown is approximately 2x that of Oldenville. Because we standardized based on age, this indicates that the difference in death rates between the two cities from violent crimes is due to something other than differences in the age structure of their populations.

True

Age-adjusted rates may mask or hide important differences in rates between age-specific groups.

True

Crude rates do not account for differences in the age structure of a population.

True

Use the following data for the next 6 questions (including this one) in this homework. Please round to 1 decimal place for each answer. Note: Due to rounding error your answers could deviate a little from mine. Pick the answers closest to your own.As an epidemiologist at the National Institutes of Health, you are asked to compare the crude, age-specific, and age adjusted death rates from violent crimes in Youngstown and Oldenville during 2007.Data on YoungstownAges / Violent Deaths/Population at midyear in 2007<20 70 1,700 20-29 60 3,500 30-39 10 2,200 Total: 140 7,400Data on Oldenville:Ages / Violent Deaths/Population at midyear in 2007<20 40 2,30020-29 35 4,15030-39 15 3,200Total: 90 9,650Standard population to use for the age-adjustment:U.S. Population, from the 2000 CensusAges/ Population<20 75,68420-29 36,88730-39 44,121Total: 156,692 Question: What is the crude rate for violent deaths per 1,000 for Youngstown and Oldenville during 2007? Calculate this based on the data appearing above and select the correct answer.

Youngstown (140/7400)* 1000 = 18.9 per 1,000 per year ; Oldenville (90/9650)* 1000 = 9.3 per 1,000 per year

Calculate the age-adjusted rates for violent deaths in Youngstown and Oldenville in 2007 per 1,000 using the U.S. standard population from the 2000 Census (again, this is based off of the data appearing in the first question in this series.)

Youngstown: (3947.5/156,692) * 1000 = 25.2 per 1,000 ; Oldenville: (1834.2/156,692) * 1000 = 11.7 per 1,000