DeVry nr503 Week 3 assignment Relative Risk Calculations Worksheet latest 2017 october

Week 3 assignment

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Relative Risk Calculations Worksheet

Guidelines& Grading Rubric

Purpose

The purpose of this assignment is to help you to begin to
understand and apply the important counts, ratios, and statistics presented in
healthcare and epidemiological research.
Remember to use the list of formulas presented prior to the problems and
to carefully consider the purpose of each calculation and how it is
interpreted.

Course Outcomes

Through this assignment, the student will demonstrate the
ability to:

(CO #3) Identify appropriate outcome measures and study
designs applicable to epidemiological subfields such as infectious disease,
chronic disease, environmental exposures, reproductive health, and genetics.

(CO #4) Apply commonly used measures of health risk.

(CO #6) Identify important sources of epidemiological data.

Due Date: Sunday 11:59 p.m. (MT) at the end of Week 3

Total Points Possible:50

REQUIREMENTS:

1. Complete
the Risk Calculation Worksheet located in Course Resources.

2. For each
question identify the correct answer.

3. Submit
the worksheet to the DropBox by 11:59 p.m. MT Sunday of Week 3

Epidemiological Formulas and Statistics

Parameter Definition Formula

Incidence (exposed) Incidence
of new cases of disease in persons who were exposed number (exposed with disease)/Total number of exposed

Incidence (unexposed) Incidence
of new cases of disease in persons who were not exposed number (unexposed with disease)/Total number of unexposed

Incidence of Disease Measure
of risk. Total number in a population
with a disease divided by the total number of the population. Number with the disease/ Total
population number

Relative Risk Risk
of disease in one group versus another.
Risk of developing a disease after exposure. If this number is one, it
means there is no risk. R(exposed)/Risk (unexposed) (# exposed with disease(divided by)/total of all exposed)

(# of non-exposed with disease/(divided by)total of all non
exposed)

Odds Ratio A
measure of exposure and disease outcome commonly used in case control studies. R(exposed)
/ R (unexposed)

1- R(exposed)
1-R(unexposed)

Prevalence The
number of cases of a disease in a given time regardless of when it began. (new
and old cases) (Persons
with the disease/ Total population) X 1000

Attributable Risk The
difference in disease in those exposed and unexposed and is calculated from
prospective data. Directly attributed to
exposure (if exposure gone, disease would be gone) R(exposed) – R(unexposed)

Crude Birth Rate
The number of live births per 1,000 people in the population (# of births/estimated mid-year population)
X 1000

Crude Death Rate
The number of deaths per 1,000 people in the population (# of deaths/estimated mid-year population) X 1000

Fetal Death Rate The
number of fetal deaths (20 weeks or more gestation) per 1,000 live births. (# of fetal deaths/ # of live births + fetal
deaths) X 1000

Annual Mortality Rate Usually
an expression of a specific disease or can be all causes per 1,000 people for a
year. (# of deaths of all causes
(or a specific disease)/Mid-year population) X 1000

Case Fatality Rate The
parentage of individuals who have a specific disease and die within a specific
time after diagnosis. (# of
persons dying from a disease after diagnosis or set period/ # of persons with
the disease) X 100

Relative Risk Calculation Worksheet

Prior to completing this worksheet, review the lessons,
reading and course text up to this point.
Also review the tables of calculations. Each question is worth five (5)
points. There is only one right answer for each of the ten problems.

1. The
population in the city of Springfield, Missouri in March, 2014 was 200,000.

The number of new cases of HIV was 28 between January 1 and
June 30th 2014.

The number of current HIV cases was 130 between January 1
and June 30th 2014.

The incidence rate of HIV cases for this 6 month period was:

A. 7 per
100,000 population

B. 14 per
100,000 population

C. 28 per
100,000 population

D. 85 per
100,000 population

2. The
prevalence rate of HIV cases in Springfield, Missouri as of June 30, 2014 was:

A. 14 per
100,000 population

B. 28 per
100,000 population

C. 79 per
100,000 population

D. 130 per
100,000 population

3. In a
North African country with a population of 5 million people, 50,000 deaths
occurred during 2014. These deaths included 5,000 people from malaria out of 10,000
persons who had Malaria.

What was the total Annual Mortality Rate for 2014 for this
country? (please show your work)

4. What was
the cause-specific mortality rate from malaria? (please show your work)

5. What was
the case-fatality percent from malaria?

6. Fill in
and total the 4 X 4 table for the following disease parameters:

Total number of people with lung cancer in a given
population = 120

Total number of people with lung cancer who smoked = 90

Total number of people with lung cancer who did not smoke =
30

Total number of people who smoked = 150

Total number of people in the population = 350

Fill in the missing parameters based on the above.

YES
LUNG CANCER

NO LUNG
CANCER TOTALS

YES SMOKING

NO SMOKING

TOTALS

7. From
Question 6, what is the total number of people with no lung cancer?

8. From
question 6, what is the total number of people who smoked, but did not have
lung cancer?

9. Set up
the problem for relative risk based on the table in #6.

10. Calculate
the relative risk.

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