NUR 206 Exam 3 Community Nursing
Concepts Guide Official Practice Exam
Actual Exam 2026/2027 with Detailed
Rationales | Complete Exam-Style Questions
| Pass Guaranteed – A+ Graded
═════════════════════════════════════
SECTION 1: PUBLIC HEALTH FOUNDATIONS & EPIDEMIOLOGY Q1 – Q10
══════════════════════════════════════
Question 1 of 50
During a routine review of communicable disease data at the county health department, a
community health nurse notices that the number of reported pertussis cases has doubled
over the past three months compared to the same period last year. To determine whether this
represents a true increase in disease burden or merely reflects improved surveillance and
reporting practices, the nurse should first examine which epidemiological measure?
A. The case fatality rate for pertussis in the current reporting period
B. The incidence rate of pertussis calculated using the local population denominator
C. The prevalence rate of pertussis among children under five years of age
D. The attack rate among households with confirmed pertussis cases
Correct Answer: B
Rationale: Incidence rate uses a population denominator and a defined time period, which
allows the nurse to distinguish a true rise in new cases from artifactual increases caused by
better detection or reporting. The case fatality rate reflects disease severity and outcomes,
not the frequency of new cases in the community. When surveillance improves, incidence
rate stabilizes as the true baseline becomes clearer, whereas raw case counts alone can be
misleading.
Question 2 of 50
A public health nurse is investigating an outbreak of norovirus at a long-term care facility.
Twelve residents developed vomiting and diarrhea within 48 hours of a shared meal. To
calculate the probability that a resident who ate the suspected meal became ill, the nurse
should compute which measure?
,A. The crude mortality rate among all facility residents during the outbreak period
B. The secondary attack rate among staff members exposed to ill residents
C. The attack rate among residents who consumed the implicated meal
D. The point prevalence of norovirus in the facility on the day of investigation
Correct Answer: C
Rationale: The attack rate is the proportion of exposed individuals who develop illness during
a defined outbreak period, making it the correct measure for a common-source exposure like
a shared meal. The secondary attack rate would apply to person-to-person transmission after
the initial exposure, not the primary common-source event. Crude mortality rate and point
prevalence do not capture the risk of illness among those specifically exposed.
Question 3 of 50
A community health nurse is reviewing mortality data for a city and notes that the crude
death rate has increased over the past decade. The city’s epidemiologist explains that the
population has aged significantly during this time. To make a fair comparison of mortality
risk across different years, the nurse should request which adjusted measure?
A. The age-adjusted mortality rate standardized to a reference population
B. The cause-specific mortality rate for chronic diseases only
C. The infant mortality rate for the same reporting periods
D. The proportional mortality ratio for cardiovascular deaths
Correct Answer: A
Rationale: Age-adjusted mortality rate removes the confounding effect of changing
population age structure by applying local age-specific death rates to a standard reference
population, enabling valid temporal comparisons. Cause-specific and proportional mortality
measures describe the distribution of deaths by cause but do not account for demographic
shifts that affect overall crude rates. Infant mortality rate is a sensitive indicator of
population health but does not reflect all-cause mortality trends in an aging population.
Question 4 of 50
During a community health fair, a nurse screens 200 adults for type 2 diabetes and identifies
18 new cases. Six months earlier, a survey of the same neighborhood found 42 known
diabetic residents in a sample of 600 adults. Which statement best describes the relationship
between these two findings?
A. The screening identified a higher incidence rate than the prior survey because the health
fair attracted sicker participants.
B. The health fair data primarily reflect prevalence, while the prior survey captures both
prevalence and incidence in the community.
, C. The prior survey found a period prevalence, whereas the health fair screening represents a
point prevalence estimate.
D. The six-month interval between the two measurements means both datasets capture
incidence rather than prevalence.
Correct Answer: C
Rationale: The health fair screening captures cases present at a single point in time, which is
point prevalence, while the prior survey conducted over a period represents period prevalence;
both are prevalence measures, not incidence. Incidence requires tracking new cases over
time in a disease-free population, which neither cross-sectional screening accomplished. The
health fair may have selection bias, but the key distinction is the temporal dimension of
prevalence measurement.
Question 5 of 50
A state health department implements a mandatory reporting system for all confirmed cases
of Legionnaires' disease. Over the first year, reported cases increase by 40% despite no
change in clinical presentation or testing volume. Which epidemiological principle best
explains this observation?
A. The incidence of Legionnaires' disease has genuinely increased due to environmental
changes in water systems.
B. The sensitivity of the surveillance system has improved, leading to more complete case
ascertainment.
C. The specificity of the case definition has decreased, causing false-positive reports to
inflate the count.
D. The predictive value of a positive test has fallen because the disease has become less
common in the population.
Correct Answer: B
Rationale: When reporting becomes mandatory and case ascertainment improves,
surveillance sensitivity increases, capturing more true cases that were previously missed
without any actual change in disease occurrence. Testing volume remained unchanged, so
the increase is not due to more screening, and there is no evidence that the case definition
specificity decreased or that the disease became less common. Improved sensitivity is the
hallmark of enhanced passive surveillance systems.
Question 6 of 50
A community health nurse is analyzing data from a cohort study that followed 5,000 smokers
and 5,000 nonsmokers for 10 years to examine lung cancer risk. At the end of the study, 250
smokers and 25 nonsmokers had developed lung cancer. Which measure should the nurse
calculate to quantify the excess risk attributable to smoking?
Concepts Guide Official Practice Exam
Actual Exam 2026/2027 with Detailed
Rationales | Complete Exam-Style Questions
| Pass Guaranteed – A+ Graded
═════════════════════════════════════
SECTION 1: PUBLIC HEALTH FOUNDATIONS & EPIDEMIOLOGY Q1 – Q10
══════════════════════════════════════
Question 1 of 50
During a routine review of communicable disease data at the county health department, a
community health nurse notices that the number of reported pertussis cases has doubled
over the past three months compared to the same period last year. To determine whether this
represents a true increase in disease burden or merely reflects improved surveillance and
reporting practices, the nurse should first examine which epidemiological measure?
A. The case fatality rate for pertussis in the current reporting period
B. The incidence rate of pertussis calculated using the local population denominator
C. The prevalence rate of pertussis among children under five years of age
D. The attack rate among households with confirmed pertussis cases
Correct Answer: B
Rationale: Incidence rate uses a population denominator and a defined time period, which
allows the nurse to distinguish a true rise in new cases from artifactual increases caused by
better detection or reporting. The case fatality rate reflects disease severity and outcomes,
not the frequency of new cases in the community. When surveillance improves, incidence
rate stabilizes as the true baseline becomes clearer, whereas raw case counts alone can be
misleading.
Question 2 of 50
A public health nurse is investigating an outbreak of norovirus at a long-term care facility.
Twelve residents developed vomiting and diarrhea within 48 hours of a shared meal. To
calculate the probability that a resident who ate the suspected meal became ill, the nurse
should compute which measure?
,A. The crude mortality rate among all facility residents during the outbreak period
B. The secondary attack rate among staff members exposed to ill residents
C. The attack rate among residents who consumed the implicated meal
D. The point prevalence of norovirus in the facility on the day of investigation
Correct Answer: C
Rationale: The attack rate is the proportion of exposed individuals who develop illness during
a defined outbreak period, making it the correct measure for a common-source exposure like
a shared meal. The secondary attack rate would apply to person-to-person transmission after
the initial exposure, not the primary common-source event. Crude mortality rate and point
prevalence do not capture the risk of illness among those specifically exposed.
Question 3 of 50
A community health nurse is reviewing mortality data for a city and notes that the crude
death rate has increased over the past decade. The city’s epidemiologist explains that the
population has aged significantly during this time. To make a fair comparison of mortality
risk across different years, the nurse should request which adjusted measure?
A. The age-adjusted mortality rate standardized to a reference population
B. The cause-specific mortality rate for chronic diseases only
C. The infant mortality rate for the same reporting periods
D. The proportional mortality ratio for cardiovascular deaths
Correct Answer: A
Rationale: Age-adjusted mortality rate removes the confounding effect of changing
population age structure by applying local age-specific death rates to a standard reference
population, enabling valid temporal comparisons. Cause-specific and proportional mortality
measures describe the distribution of deaths by cause but do not account for demographic
shifts that affect overall crude rates. Infant mortality rate is a sensitive indicator of
population health but does not reflect all-cause mortality trends in an aging population.
Question 4 of 50
During a community health fair, a nurse screens 200 adults for type 2 diabetes and identifies
18 new cases. Six months earlier, a survey of the same neighborhood found 42 known
diabetic residents in a sample of 600 adults. Which statement best describes the relationship
between these two findings?
A. The screening identified a higher incidence rate than the prior survey because the health
fair attracted sicker participants.
B. The health fair data primarily reflect prevalence, while the prior survey captures both
prevalence and incidence in the community.
, C. The prior survey found a period prevalence, whereas the health fair screening represents a
point prevalence estimate.
D. The six-month interval between the two measurements means both datasets capture
incidence rather than prevalence.
Correct Answer: C
Rationale: The health fair screening captures cases present at a single point in time, which is
point prevalence, while the prior survey conducted over a period represents period prevalence;
both are prevalence measures, not incidence. Incidence requires tracking new cases over
time in a disease-free population, which neither cross-sectional screening accomplished. The
health fair may have selection bias, but the key distinction is the temporal dimension of
prevalence measurement.
Question 5 of 50
A state health department implements a mandatory reporting system for all confirmed cases
of Legionnaires' disease. Over the first year, reported cases increase by 40% despite no
change in clinical presentation or testing volume. Which epidemiological principle best
explains this observation?
A. The incidence of Legionnaires' disease has genuinely increased due to environmental
changes in water systems.
B. The sensitivity of the surveillance system has improved, leading to more complete case
ascertainment.
C. The specificity of the case definition has decreased, causing false-positive reports to
inflate the count.
D. The predictive value of a positive test has fallen because the disease has become less
common in the population.
Correct Answer: B
Rationale: When reporting becomes mandatory and case ascertainment improves,
surveillance sensitivity increases, capturing more true cases that were previously missed
without any actual change in disease occurrence. Testing volume remained unchanged, so
the increase is not due to more screening, and there is no evidence that the case definition
specificity decreased or that the disease became less common. Improved sensitivity is the
hallmark of enhanced passive surveillance systems.
Question 6 of 50
A community health nurse is analyzing data from a cohort study that followed 5,000 smokers
and 5,000 nonsmokers for 10 years to examine lung cancer risk. At the end of the study, 250
smokers and 25 nonsmokers had developed lung cancer. Which measure should the nurse
calculate to quantify the excess risk attributable to smoking?
