Question Relative Risk Calculations Worksheet

15 Jun Question Relative Risk Calculations Worksheet

Question
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 DocSharing.

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 Answer Key

Prior to completing this worksheet, review the lessons, reading and course text up to this point. Also review th