NR 503 EPIDEMIOLOGY EXAM
QUESTIONS AND ANSWERS 100%
SOLVED
Epidemiology - ✔✔The science of public health.
The focus on assessing risk, data and demographics for large groups
Population Health - ✔✔Focuses on risk, data, demographics and
outcomes.
Outcome - ✔✔The end result following an intervention
Aggregate - ✔✔Defined population
Community - ✔✔Composed of multiple aggregates
Data - ✔✔Compile data
Prevalence - ✔✔Measures the existence of all current cases within a time
frame.
The number or proportion of cases of a particular disease or condition
present in a population at a given time.
Incidence - ✔✔The number or rate of new cases of a particular condition
during a specific time.
Measures the appearance of new cases.
Surveillance - ✔✔Collection, analysis, dissemination of data.
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, High- risk - ✔✔Increased chance of poor health outcome.
Morbidity - ✔✔Presence of illness in population
Mortality - ✔✔Related to the tracking of deaths within an aggregate
Validity - ✔✔the extent to which a test measures or predicts what it is
supposed to.
test is the ability of that test to distinguish correctly who has a disease
Specificity - ✔✔the ability of a test to correctly identify those who do not
have the disease
sensitivity - ✔✔the ability of a test to correctly identify those who have a
disease
primary prevention - ✔✔Efforts to prevent an injury or illness from ever
occurring.
Primary prevention identifies modifiable risk
secondary prevention - ✔✔-focuses on early identification of individuals or
communities experiencing illness, providing treatment, and conducting
activities that are geared to prevent worsening health status
-examples: communicable disease screening and case finding; early
detection and treatment of diabetes; exercise programs for older adult
clients who are frail
tertiary prevention - ✔✔actions taken to contain damage once a disease or
disability has progressed beyond its early stages
tertiary prevention examples - ✔✔- enhance rehabilitation from disease,
injury, or disability
- Provide cardiac rehabilitation, medication, and surgery.
- medical treatment
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
QUESTIONS AND ANSWERS 100%
SOLVED
Epidemiology - ✔✔The science of public health.
The focus on assessing risk, data and demographics for large groups
Population Health - ✔✔Focuses on risk, data, demographics and
outcomes.
Outcome - ✔✔The end result following an intervention
Aggregate - ✔✔Defined population
Community - ✔✔Composed of multiple aggregates
Data - ✔✔Compile data
Prevalence - ✔✔Measures the existence of all current cases within a time
frame.
The number or proportion of cases of a particular disease or condition
present in a population at a given time.
Incidence - ✔✔The number or rate of new cases of a particular condition
during a specific time.
Measures the appearance of new cases.
Surveillance - ✔✔Collection, analysis, dissemination of data.
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, High- risk - ✔✔Increased chance of poor health outcome.
Morbidity - ✔✔Presence of illness in population
Mortality - ✔✔Related to the tracking of deaths within an aggregate
Validity - ✔✔the extent to which a test measures or predicts what it is
supposed to.
test is the ability of that test to distinguish correctly who has a disease
Specificity - ✔✔the ability of a test to correctly identify those who do not
have the disease
sensitivity - ✔✔the ability of a test to correctly identify those who have a
disease
primary prevention - ✔✔Efforts to prevent an injury or illness from ever
occurring.
Primary prevention identifies modifiable risk
secondary prevention - ✔✔-focuses on early identification of individuals or
communities experiencing illness, providing treatment, and conducting
activities that are geared to prevent worsening health status
-examples: communicable disease screening and case finding; early
detection and treatment of diabetes; exercise programs for older adult
clients who are frail
tertiary prevention - ✔✔actions taken to contain damage once a disease or
disability has progressed beyond its early stages
tertiary prevention examples - ✔✔- enhance rehabilitation from disease,
injury, or disability
- Provide cardiac rehabilitation, medication, and surgery.
- medical treatment
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
