NR503 Midterm Exam : Population Health, Epidemiology & Statistical Principles
Question 1 The population of a city on February 15, 2005, was 36,600. The city has a passive
surveillance system that collects hospital and private physician reports of influenza cases every
month. During the period between January 1 and April 1, 2005, 2,200 new cases of influenza
occurred in the city. Of these cases, 775 persons were ill with influenza according to
surveillance reports on April 1, 2005. The monthly incidence rate of active cases of influenza for
the 3-month period was:
4 per 1,000 population
17 per 1,000 population
20 per 1,000 population
39 per 1,000 population
130 per 1,000 population
Question 2 What would be the effect on age-specific incidence rates of uterine cancer if women
with hysterectomies were excluded from the denominator of incidence calculations assuming
that most women who have had hysterectomies are older than 50 years of age.
The rates in all age groups would remain the same.
Only rates in women older than 50 years of age would tend to decrease.
Rates in women younger than 50 years would increase compared to women older than 50
years of age.
Rates would increase in women older than 50 years of age but may decrease in younger
women as they get older.
It cannot be determined whether the rates would increase or decrease.
Question 3 The ability of a single person to remain free of clinical illness following exposure to
an infectious agent is known as:
Hygiene
Vaccination
Herd immunity
Immunity
Latency
Question 4 Which of the following reasons can explain why a person who did not consume the
infective food item got sick?
They were directly exposed to persons who did eat the infective food item Diarrhea is a general
symptom consistent with a number of illnesses
There may have been an inaccurate recall of which foods were eaten
, All of the above
None of the above
Question 5 Which of the food items (or combination of items) is most likely to be the infective
item(s)?
Pizza only
Ice cream only
Neither pizza nor ice cream
Both pizza and ice cream
Cannot be assumed from the data shown
Question 6 The table below describes the number of illnesses and deaths caused by plague in
four communities. The case-fatality rate associated with plague is lowest in which community?
Community A
Community B
Community C
Community D
Question 7 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?
The duration of disease is becoming shorter.
The duration of disease is becoming longer.
The case-fatality rate of this disease is decreasing.
Efforts to prevent new cases of this disease are becoming more successful.
The risk of the disease has decreased over the past 20 years.
Question 8 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). Based on the
information above, one may conclude:
Age-specific mortality rates for measles decreased for the period 1910–1914 to 1925–1929
Age-specific mortality rates for measles increased for the period 1910–1914 to 1925–1929
The case-fatality rate decreased for the period 1910–1914 to 1935–1939
Children born in 1910–1914 had the highest rate of death in all periods
Children ages 5 to 9 had the highest rate of death in all periods
Question 10 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 below lists the
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller chinks. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.49. You're not tied to anything after your purchase.
