Page 1 of 15
NR503 FINAL EXAM 202/2025 LATEST | NR 503 EPIDEMIOLOGY
FINAL EXAM UPDATE QUESTIONS AND CORRECT ANSWERS
|GRADED A+ (CHAMBERLAIN COLLEGE OF NURSING)
A disease has an incidence of 10 per 1,000 persons per year, and 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a lab
test was developed that identified 90% of cases an average of 6 months prior to
symptom onset; however, the prognosis did not improve after diagnosis. Which
statement is true concerning the duration of the disease after the development of the
lab test? - ANSWER- Mean duration of a case of the disease is longer in 2000
What is the overall attack rate in persons who did not eat ice cream? - ANSWER-
33%
The table above describes the number of illnesses and deaths caused by plague in four
communities. The proportionate mortality ratio associated with plague is lowest in
which community? - ANSWER- Community D
Which of the following is characteristic of a single-exposure, common-vehicle
outbreak? - ANSWER- The epidemic curve has a normal distribution when plotted
against the logarithm of time
The following table gives the mean annual age-specific mortality rates from measles
during the first 25 years of life in successive 5-year periods. You may assume that the
population is in a steady state (i.e., migrations out are equal to migrations in) -
ANSWER- 2.4 3.3 2.0 0.6 0.1
A disease has an incidence of 10 per 1,000 persons per year, and 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a lab
test was developed that identified 90% of cases an average of 6 months prior to
symptom onset; however, the prognosis did not improve after diagnosis.
Comparing the epidemiology of the disease prior to 2000 with the epidemiology of
the disease after the development of the lab test, which statement is true concerning
the disease in 2000? - ANSWER- Incidence is higher and prevalence is higher than in
1999
A survey was conducted among 1,000 randomly sampled adult males in the United
States in 2005. The results from this survey are shown below. The researchers stated
that there was a doubling of risk of hypertension in each group younger than 60 years
of age. You conclude that the researchers' interpretation: - ANSWER- Is incorrect
, Page 2 of 15
because prevalence rates are estimated
Which of the following is a condition which may occur during the incubation period?
- ANSWER- Transmission of infection
The incidence and prevalence rates of a chronic childhood illness for a specific
community are given below. Based on the data, which of the following interpretations
best describes disease X? - ANSWER- The duration of disease is becoming longer
A disease has an incidence of 10 per 1,000 persons per year, and 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a lab
test was developed that identified 90% of cases an average of 6 months prior to
symptom onset; however, the prognosis did not improve after diagnosis. Which
statement is true concerning the disease-specific mortality rate after the development
of the lab test? - ANSWER- The mortality rate for the disease is the same in 2000
Among those who are 25 years of age, those who have been driving less than 5 years
had 13,700 motor vehicle accidents in 1 year, while those who had been driving for
more than 5 years had 21,680 motor vehicle accidents during the same time period. It
was concluded from these data that 25-year-olds with more driving experience have
increased accidents compared to those who started driving later. This conclusion is: -
ANSWER- Incorrect because rates are not reported
In a country with a population of 16 million people, 175,000 deaths occurred during
the year ending December 31, 2005. These included 45,000 deaths from tuberculosis
(TB) in 135,000 persons who were sick with TB. Assume that the population
remained constant throughout the year. Not all 135,000 cases of TB were contracted
during 2005. Which of the following statements is true? - ANSWER- None of the
above
Which of the following is a condition which may occur during the incubation period?
- ANSWER- Transmission of infection
Test A has a sensitivity of 95% and a specificity of 90%. Test B has a sensitivity of
80% and a specificity of 98%. In a community of 10,000 people with 5% prevalence
of the disease, Test A has always been given before Test B. What is the best reason
for changing the order of the tests? - ANSWER- The total number of false positives
found by both tests is decreased if Test B is given first
In 2001, a state enacted a law that required the use of safety seats for all children
under 7 years of age and mandatory seatbelt use for all persons. The table above lists
the number of deaths due to motor vehicle accidents (MVAs) and the total population
NR503 FINAL EXAM 202/2025 LATEST | NR 503 EPIDEMIOLOGY
FINAL EXAM UPDATE QUESTIONS AND CORRECT ANSWERS
|GRADED A+ (CHAMBERLAIN COLLEGE OF NURSING)
A disease has an incidence of 10 per 1,000 persons per year, and 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a lab
test was developed that identified 90% of cases an average of 6 months prior to
symptom onset; however, the prognosis did not improve after diagnosis. Which
statement is true concerning the duration of the disease after the development of the
lab test? - ANSWER- Mean duration of a case of the disease is longer in 2000
What is the overall attack rate in persons who did not eat ice cream? - ANSWER-
33%
The table above describes the number of illnesses and deaths caused by plague in four
communities. The proportionate mortality ratio associated with plague is lowest in
which community? - ANSWER- Community D
Which of the following is characteristic of a single-exposure, common-vehicle
outbreak? - ANSWER- The epidemic curve has a normal distribution when plotted
against the logarithm of time
The following table gives the mean annual age-specific mortality rates from measles
during the first 25 years of life in successive 5-year periods. You may assume that the
population is in a steady state (i.e., migrations out are equal to migrations in) -
ANSWER- 2.4 3.3 2.0 0.6 0.1
A disease has an incidence of 10 per 1,000 persons per year, and 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a lab
test was developed that identified 90% of cases an average of 6 months prior to
symptom onset; however, the prognosis did not improve after diagnosis.
Comparing the epidemiology of the disease prior to 2000 with the epidemiology of
the disease after the development of the lab test, which statement is true concerning
the disease in 2000? - ANSWER- Incidence is higher and prevalence is higher than in
1999
A survey was conducted among 1,000 randomly sampled adult males in the United
States in 2005. The results from this survey are shown below. The researchers stated
that there was a doubling of risk of hypertension in each group younger than 60 years
of age. You conclude that the researchers' interpretation: - ANSWER- Is incorrect
, Page 2 of 15
because prevalence rates are estimated
Which of the following is a condition which may occur during the incubation period?
- ANSWER- Transmission of infection
The incidence and prevalence rates of a chronic childhood illness for a specific
community are given below. Based on the data, which of the following interpretations
best describes disease X? - ANSWER- The duration of disease is becoming longer
A disease has an incidence of 10 per 1,000 persons per year, and 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a lab
test was developed that identified 90% of cases an average of 6 months prior to
symptom onset; however, the prognosis did not improve after diagnosis. Which
statement is true concerning the disease-specific mortality rate after the development
of the lab test? - ANSWER- The mortality rate for the disease is the same in 2000
Among those who are 25 years of age, those who have been driving less than 5 years
had 13,700 motor vehicle accidents in 1 year, while those who had been driving for
more than 5 years had 21,680 motor vehicle accidents during the same time period. It
was concluded from these data that 25-year-olds with more driving experience have
increased accidents compared to those who started driving later. This conclusion is: -
ANSWER- Incorrect because rates are not reported
In a country with a population of 16 million people, 175,000 deaths occurred during
the year ending December 31, 2005. These included 45,000 deaths from tuberculosis
(TB) in 135,000 persons who were sick with TB. Assume that the population
remained constant throughout the year. Not all 135,000 cases of TB were contracted
during 2005. Which of the following statements is true? - ANSWER- None of the
above
Which of the following is a condition which may occur during the incubation period?
- ANSWER- Transmission of infection
Test A has a sensitivity of 95% and a specificity of 90%. Test B has a sensitivity of
80% and a specificity of 98%. In a community of 10,000 people with 5% prevalence
of the disease, Test A has always been given before Test B. What is the best reason
for changing the order of the tests? - ANSWER- The total number of false positives
found by both tests is decreased if Test B is given first
In 2001, a state enacted a law that required the use of safety seats for all children
under 7 years of age and mandatory seatbelt use for all persons. The table above lists
the number of deaths due to motor vehicle accidents (MVAs) and the total population
