NR 503 Midterm UPDATED ACTUAL
Exam Questions and CORRECT Answers
Surveillance - CORRECT ANSWER - used to monitor changes in disease frequency or to
monitor changes in the levels of risk factors. Most frequently conducted for infectious diseases
"on going systemic collection, analysis, and interpretation of health data" Descriptive
Rates - CORRECT ANSWER - tells us how fast the disease in the population is occurring
Proportions - CORRECT ANSWER - tell us what fractions of the population is affected
Incidence rate of a disease - CORRECT ANSWER - is defined as the NEW number of
cases of a disease that occur during a specific period of time in a population at risk
Cumulative incidence - CORRECT ANSWER - the incidence calculated using a period of
time during which all of the individuals in the population are considered to be at risk for the
outcome
Person Time - CORRECT ANSWER - when different individuals are observed at different
times (person years)
Different Periods of time incidence rate - CORRECT ANSWER - # of NEW cases/total
person-time
Identifying New Cases in order to calculate incidence - CORRECT ANSWER - knowing
the baseline then re screening after a year to see the new cases that have developed
Attack Rate - CORRECT ANSWER - number of people exposed to a suspect food who
became ill/ # of people who were exposed to that food
Exam Questions and CORRECT Answers
Surveillance - CORRECT ANSWER - used to monitor changes in disease frequency or to
monitor changes in the levels of risk factors. Most frequently conducted for infectious diseases
"on going systemic collection, analysis, and interpretation of health data" Descriptive
Rates - CORRECT ANSWER - tells us how fast the disease in the population is occurring
Proportions - CORRECT ANSWER - tell us what fractions of the population is affected
Incidence rate of a disease - CORRECT ANSWER - is defined as the NEW number of
cases of a disease that occur during a specific period of time in a population at risk
Cumulative incidence - CORRECT ANSWER - the incidence calculated using a period of
time during which all of the individuals in the population are considered to be at risk for the
outcome
Person Time - CORRECT ANSWER - when different individuals are observed at different
times (person years)
Different Periods of time incidence rate - CORRECT ANSWER - # of NEW cases/total
person-time
Identifying New Cases in order to calculate incidence - CORRECT ANSWER - knowing
the baseline then re screening after a year to see the new cases that have developed
Attack Rate - CORRECT ANSWER - number of people exposed to a suspect food who
became ill/ # of people who were exposed to that food
