ATI RN COMMUNITY HEALTH CMS EXAM 2026 | All 100
Questions and 100% Correct Answers | CM ATI Community
Health Proctored Exam | 2026/2027 New | Pass Guaranteed -
A+ Graded
Domain 1: Epidemiology and Disease Prevention (Questions 1-15)
Q1: A community health nurse is analyzing data from a recent influenza outbreak in a
long-term care facility. During the 2-week period, 45 residents developed influenza
among 150 total residents. What is the attack rate for this outbreak?
A. 15%
B. 30%
C. 45%
D. 60%
Correct Answer: B
Rationale: The attack rate is calculated as (number of new cases during time period ÷
total population at risk) × 100. In this case: 45 ÷ 150 = 0.30 or 30%. This represents the
cumulative incidence during the outbreak period. Option A (15%) incorrectly uses the
wrong numerator. Option C (45%) represents the raw number without calculation. Option
D (60%) is a miscalculation. The attack rate is a specific epidemiological measure used
during outbreak investigations to determine the extent of disease spread in a defined
population over a limited time period. This reflects secondary prevention through
disease surveillance.
Q2: A public health nurse is planning a screening program for colorectal cancer in a
community with limited healthcare access. Which screening method should the nurse
,prioritize based on USPSTF Grade A recommendations for average-risk adults aged
45-75?
A. Annual digital rectal examination
B. Fecal immunochemical test (FIT) every year
C. CT colonography every 5 years
D. Flexible sigmoidoscopy every 10 years
Correct Answer: B
Rationale: The USPSTF gives Grade A recommendations to several colorectal cancer
screening strategies for average-risk adults aged 45-75, including annual FIT testing. FIT
is non-invasive, cost-effective, and feasible for community settings with limited access.
Option A is incorrect because digital rectal examination alone is insufficient for
colorectal cancer screening. Option C (CT colonography) and Option D (flexible
sigmoidoscopy) are also recommended strategies, but FIT is most practical for
low-resource community settings. This represents secondary prevention through early
detection. The nurse must consider population-level feasibility, not just individual test
characteristics.
Q3: During a community health assessment, a nurse notes that a rural county has had
50 new cases of diabetes diagnosed in the past year among a population of 10,000. The
total number of people living with diabetes in the county is 450. Which statement
accurately describes these data?
A. The incidence is 50 per 10,000 and the prevalence is 450 per 10,000
B. The incidence is 450 per 10,000 and the prevalence is 50 per 10,000
C. The attack rate is 9% and the prevalence is 5%
D. The incidence rate is 5% and the prevalence rate is 45%
Correct Answer: A
Rationale: Incidence measures new cases over a time period (50 new cases per 10,000
population per year), while prevalence measures all existing cases at a point in time
,(450 total cases per 10,000 population). Option B reverses these definitions. Option C
incorrectly calculates attack rate (used for outbreaks, not chronic disease) and
misrepresents prevalence. Option D uses percentages instead of rates per population
and miscalculates. Understanding incidence vs. prevalence is fundamental for program
planning—high prevalence with low incidence suggests good survival/long disease
duration, while high incidence suggests emerging public health problem requiring
primary prevention.
Q4: A community health nurse is investigating a foodborne illness outbreak at a local
restaurant. Which step should the nurse take FIRST in the outbreak investigation?
A. Implement control measures to prevent additional cases
B. Verify the diagnosis and confirm the outbreak
C. Identify all cases through active surveillance
D. Analyze data by time, place, and person
Correct Answer: B
Rationale: The 10 steps of outbreak investigation begin with verifying the diagnosis and
confirming that an outbreak exists (number of cases exceeds expected baseline). This
ensures resources are appropriately allocated to a true outbreak rather than sporadic
cases or misdiagnosis. While Option A (control measures) seems urgent, premature
implementation without verification may waste resources. Option C (case finding) and
Option D (descriptive epidemiology) occur after confirmation. This reflects the core
public health function of surveillance and epidemiological investigation. The nurse must
apply systematic epidemiological methods rather than reacting to individual patient
needs.
Q5: A nurse is teaching a community group about levels of prevention. Which example
best represents primary prevention?
, A. Screening school children for scoliosis
B. Administering chemotherapy to a patient with breast cancer
C. Providing childhood immunizations against measles
D. Teaching a diabetic patient foot care to prevent amputation
Correct Answer: C
Rationale: Primary prevention prevents disease occurrence before it
happens—immunizations create immunity before exposure to pathogens. Option A
(scoliosis screening) is secondary prevention (early detection). Option B
(chemotherapy) is tertiary prevention (treatment of established disease). Option D
(diabetic foot care) is tertiary prevention (preventing complications of existing disease).
Understanding prevention levels is essential for population-focused nursing—primary
prevention targets healthy populations and is most cost-effective, while tertiary
prevention is most resource-intensive. Community health nurses prioritize primary
prevention to maximize population health impact.
Q6: A public health department notes that a particular disease occurs at a constant,
expected rate within the community every year. How should the nurse epidemiologist
classify this disease pattern?
A. Epidemic
B. Endemic
C. Pandemic
D. Sporadic
Correct Answer: B
Rationale: Endemic refers to the constant presence of a disease within a geographic
area at predictable rates (e.g., influenza in winter, Lyme disease in endemic areas).
Option A (epidemic) means occurrence exceeds normal expected levels. Option C
(pandemic) is an epidemic spreading across multiple countries/continents. Option D
(sporadic) refers to occasional, irregular cases without geographic clustering.
Questions and 100% Correct Answers | CM ATI Community
Health Proctored Exam | 2026/2027 New | Pass Guaranteed -
A+ Graded
Domain 1: Epidemiology and Disease Prevention (Questions 1-15)
Q1: A community health nurse is analyzing data from a recent influenza outbreak in a
long-term care facility. During the 2-week period, 45 residents developed influenza
among 150 total residents. What is the attack rate for this outbreak?
A. 15%
B. 30%
C. 45%
D. 60%
Correct Answer: B
Rationale: The attack rate is calculated as (number of new cases during time period ÷
total population at risk) × 100. In this case: 45 ÷ 150 = 0.30 or 30%. This represents the
cumulative incidence during the outbreak period. Option A (15%) incorrectly uses the
wrong numerator. Option C (45%) represents the raw number without calculation. Option
D (60%) is a miscalculation. The attack rate is a specific epidemiological measure used
during outbreak investigations to determine the extent of disease spread in a defined
population over a limited time period. This reflects secondary prevention through
disease surveillance.
Q2: A public health nurse is planning a screening program for colorectal cancer in a
community with limited healthcare access. Which screening method should the nurse
,prioritize based on USPSTF Grade A recommendations for average-risk adults aged
45-75?
A. Annual digital rectal examination
B. Fecal immunochemical test (FIT) every year
C. CT colonography every 5 years
D. Flexible sigmoidoscopy every 10 years
Correct Answer: B
Rationale: The USPSTF gives Grade A recommendations to several colorectal cancer
screening strategies for average-risk adults aged 45-75, including annual FIT testing. FIT
is non-invasive, cost-effective, and feasible for community settings with limited access.
Option A is incorrect because digital rectal examination alone is insufficient for
colorectal cancer screening. Option C (CT colonography) and Option D (flexible
sigmoidoscopy) are also recommended strategies, but FIT is most practical for
low-resource community settings. This represents secondary prevention through early
detection. The nurse must consider population-level feasibility, not just individual test
characteristics.
Q3: During a community health assessment, a nurse notes that a rural county has had
50 new cases of diabetes diagnosed in the past year among a population of 10,000. The
total number of people living with diabetes in the county is 450. Which statement
accurately describes these data?
A. The incidence is 50 per 10,000 and the prevalence is 450 per 10,000
B. The incidence is 450 per 10,000 and the prevalence is 50 per 10,000
C. The attack rate is 9% and the prevalence is 5%
D. The incidence rate is 5% and the prevalence rate is 45%
Correct Answer: A
Rationale: Incidence measures new cases over a time period (50 new cases per 10,000
population per year), while prevalence measures all existing cases at a point in time
,(450 total cases per 10,000 population). Option B reverses these definitions. Option C
incorrectly calculates attack rate (used for outbreaks, not chronic disease) and
misrepresents prevalence. Option D uses percentages instead of rates per population
and miscalculates. Understanding incidence vs. prevalence is fundamental for program
planning—high prevalence with low incidence suggests good survival/long disease
duration, while high incidence suggests emerging public health problem requiring
primary prevention.
Q4: A community health nurse is investigating a foodborne illness outbreak at a local
restaurant. Which step should the nurse take FIRST in the outbreak investigation?
A. Implement control measures to prevent additional cases
B. Verify the diagnosis and confirm the outbreak
C. Identify all cases through active surveillance
D. Analyze data by time, place, and person
Correct Answer: B
Rationale: The 10 steps of outbreak investigation begin with verifying the diagnosis and
confirming that an outbreak exists (number of cases exceeds expected baseline). This
ensures resources are appropriately allocated to a true outbreak rather than sporadic
cases or misdiagnosis. While Option A (control measures) seems urgent, premature
implementation without verification may waste resources. Option C (case finding) and
Option D (descriptive epidemiology) occur after confirmation. This reflects the core
public health function of surveillance and epidemiological investigation. The nurse must
apply systematic epidemiological methods rather than reacting to individual patient
needs.
Q5: A nurse is teaching a community group about levels of prevention. Which example
best represents primary prevention?
, A. Screening school children for scoliosis
B. Administering chemotherapy to a patient with breast cancer
C. Providing childhood immunizations against measles
D. Teaching a diabetic patient foot care to prevent amputation
Correct Answer: C
Rationale: Primary prevention prevents disease occurrence before it
happens—immunizations create immunity before exposure to pathogens. Option A
(scoliosis screening) is secondary prevention (early detection). Option B
(chemotherapy) is tertiary prevention (treatment of established disease). Option D
(diabetic foot care) is tertiary prevention (preventing complications of existing disease).
Understanding prevention levels is essential for population-focused nursing—primary
prevention targets healthy populations and is most cost-effective, while tertiary
prevention is most resource-intensive. Community health nurses prioritize primary
prevention to maximize population health impact.
Q6: A public health department notes that a particular disease occurs at a constant,
expected rate within the community every year. How should the nurse epidemiologist
classify this disease pattern?
A. Epidemic
B. Endemic
C. Pandemic
D. Sporadic
Correct Answer: B
Rationale: Endemic refers to the constant presence of a disease within a geographic
area at predictable rates (e.g., influenza in winter, Lyme disease in endemic areas).
Option A (epidemic) means occurrence exceeds normal expected levels. Option C
(pandemic) is an epidemic spreading across multiple countries/continents. Option D
(sporadic) refers to occasional, irregular cases without geographic clustering.
