Chamberlain College of Nursing NR503 Population Health, Epidemiology, & Statistical Principles 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 NR503 W3 Relative Risk Calculation 1 Chamberlain College of Nursing Parameter Incidence (exposed) Incidence (unexposed) Incidence of Disease Relative Risk Odds Ratio Prevalence Attributable Risk Crude Birth Rate Crude Death Rate Fetal Death Rate Annual Mortality Rate Case Fatality Rate NR503 Population Health, Epidemiology, & Statistical Principles Definition Formula Incidence of new cases of number (exposed with disease in persons who were disease)/Total number of exposed exposed Incidence of new cases of number (unexposed with disease in persons who were disease)/Total number of not exposed unexposed Measure of risk. Total number Number with the disease/ Total in a population with a disease population number divided by the total number of the population. Risk of disease in one group (# exposed with versus another. Risk of disease(divided by)/total of all developing a disease after exposed) exposure. If this number is one, (# of non-exposed with disease/ it means there is no risk. (divided by)total of all non R(exposed)/Risk (unexposed) exposed) A measure of exposure and R(exposed) / R (unexposed) disease outcome commonly 1- R(exposed) 1used in case control studies. R(unexposed) The number of cases of a (Persons with the disease/ Total disease in a given time population) X 1000 regardless of when it began. (new and old cases) The difference in disease in R(exposed) - R(unexposed) those exposed and unexposed and is calculated from prospective data. Directly attributed to exposure (if exposure gone, disease would be gone) The number of live births per (# of births/estimated mid-year 1,000 people in the population population) X 1000 The number of deaths per (# of deaths/estimated mid-year 1,000 people in the population population) X 1000 The number of fetal deaths (20 (# of fetal deaths/ # of live births weeks or more gestation) per + fetal deaths) X 1000 1,000 live births. Usually an expression of a (# of deaths of all causes (or a specific disease or can be all specific disease)/Mid-year causes per 1,000 people for a population) X 1000 year. The parentage of individuals (# of persons dying from a who have a specific disease disease after diagnosis or set and die within a specific time period/ # of persons with the after diagnosis. disease) X 100 Relative Risk Calculation Worksheet Answer Key NR503 W3 Relative Risk Calculation 2 Chamberlain College of Nursing NR503 Population Health, Epidemiology, & Statistical Principles 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 NR503 W3 Relative Risk Calculation 3 Chamberlain College of Nursing NR503 Population Health, Epidemiology, & Statistical Principles 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. NR503 W3 Relative Risk Calculation 4