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.
NR 503 DeVry Week 3 Relative Risk Calculation Worksheet Latest
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
Incidence (exposed)
Definition
Incidence of new cases of disease in persons who were exposed
Formula
number (exposed with disease)/Total number of exposed
Incidence (unexposed)
Definition
Incidence of new cases of disease in persons who were not exposed
Formula
number (unexposed with disease)/Total number of unexposed
Incidence of Disease
Definition
Measure of risk. Total number in a population with a disease divided by the total number of the population.
Formula
Number with the disease/ Total population number
Relative Risk
Definition
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)
Formula
(# exposed with disease (divided by)/total of all exposed)
(# of non-exposed with disease/(divided by)total of all non-exposed)
Odds Ratio
Definition
A measure of exposure and disease outcome commonly used in case control studies.
Formula
R (exposed)/ R (unexposed)
1- R (exposed) 1-R (unexposed)
Prevalence
Definition
The number of cases of a disease in a given time regardless of when it began. (new and old cases)
Formula
(Persons with the disease/ Total population) X 1000
Attributable Risk
Definition
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)
Formula
R(exposed) – R(unexposed)