NR 503 Midterm Study Guide Questions
with Verified Answers
Epidemiology - Answer-The study of disease distribution within populations and the risk
factors that affect increases or decreases in distribution
Risk Factor - Answer-a condition that may adversely affect an individual's health
prevalence rate - Answer-The number of affected persons present in the population at a
specific time divided by the number of persons in the population at that time.
incidence rate - Answer-the number of new cases of disease within a population during
a specific period
primary prevention - Answer-preventing a disease or disorder before it happens
secondary prevention - Answer-screening and early detection
tertiary prevention - Answer-Interventions that would prevent complications from chronic
conditions and prevent further illness, injury, or disability.
Validity - Answer-ability of test to distinguish correctly who has a disease
Sensitivity - Answer-The ability of a test to identify correctly those who have the
disease.
Specificity - Answer-The ability of the test to identify correctly those who do not have the
disease.
absolute risk - Answer-the incidence of disease in a population
Attributable risk - Answer-how much of a risk of the disease we hope to prevent if able
to eliminate exposure to the agent in question
relative risk - Answer-The ratio of the risk of disease in exposed individuals to the risk of
disease in non-exposed individuals.
odds ratio - Answer-the ratio of the odds of development of disease in a non-exposed
person
immunity - Answer-ability of a single person to remain free of clinical illness following
exposure to an infectious agent
necessary - Answer-disease will occur only if factor present
with Verified Answers
Epidemiology - Answer-The study of disease distribution within populations and the risk
factors that affect increases or decreases in distribution
Risk Factor - Answer-a condition that may adversely affect an individual's health
prevalence rate - Answer-The number of affected persons present in the population at a
specific time divided by the number of persons in the population at that time.
incidence rate - Answer-the number of new cases of disease within a population during
a specific period
primary prevention - Answer-preventing a disease or disorder before it happens
secondary prevention - Answer-screening and early detection
tertiary prevention - Answer-Interventions that would prevent complications from chronic
conditions and prevent further illness, injury, or disability.
Validity - Answer-ability of test to distinguish correctly who has a disease
Sensitivity - Answer-The ability of a test to identify correctly those who have the
disease.
Specificity - Answer-The ability of the test to identify correctly those who do not have the
disease.
absolute risk - Answer-the incidence of disease in a population
Attributable risk - Answer-how much of a risk of the disease we hope to prevent if able
to eliminate exposure to the agent in question
relative risk - Answer-The ratio of the risk of disease in exposed individuals to the risk of
disease in non-exposed individuals.
odds ratio - Answer-the ratio of the odds of development of disease in a non-exposed
person
immunity - Answer-ability of a single person to remain free of clinical illness following
exposure to an infectious agent
necessary - Answer-disease will occur only if factor present
