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NR 503 Chamberlain College of Nursing Week 4 Midterm Exam Questions with Verified Answers | 2026 Update Graded A+

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Dominate your NR 503 Epidemiology midterm at Chamberlain College of Nursing with this complete 2026 updated exam prep guide! This 21-page resource features real midterm questions with 100% verified correct answers (e.g., person-years as a valid denominator for risk estimates [ It is a valid denominator for estimates of risk for individuals]; HEDIS categories including effectiveness/access/satisfaction/use/cost of care; Institute for Healthcare Improvement's rapid cycle model as Plan-Do-Study-Act; period prevalence example as asthma percentage over 12 months; influenza prevalence/incidence calculations at 20 per 1,000; age-specific uterine cancer rates increasing post-50 if hysterectomies excluded; immunity as freedom from illness post-exposure; all reasons explaining non-consumer illness in outbreaks; ice cream as infective item). Covers core epidemiology concepts like surveillance (active/passive), cohort/case-control designs, odds ratios/confounders/biases (selection/recall/misclassification), life tables/survival analysis, attack/case-fatality rates (plague/SARS examples), duration/prognosis, randomization, and population health outcomes. Ideal for MSN/FNP students prepping for Week 4 midterm or certification — Q&A format with rationales ensures deep understanding and assured A+ success!

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NR 503/NR503 -CHAMBERLAIN COLLEGE OF
NURSING WEEK 4 MIDTERM EXAM QUESTIONS
WITH 100%VERIFIED CORRECT ANSWERS
2026 UPDATE -GRADED A+



Which of the following statements about person-years is not true?

✓ It is a valid denominator for estimates of risk for individuals




A nurse practitioner working in a primary care practice is analyzing end of the year outcome indicators
utilizing the HEDIS categories. Which of the following is a HEDIS category? Select all that apply.

✓ Effectiveness of care
✓ Access/availability of care
✓ Satisfaction with the experience of care
✓ Use of services
✓ Cost of care




The Institute for Healthcare Improvement uses a rapid cycle improvement model. The key features of
this model are:

✓ Plan, Do, Study, Act



Which of the following is an example of a period prevalence rate?

✓ Percentage of people in the US who had asthma during the past 12 months of any particular
year




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,

1

,775 persons were ill with influenza according to surveillance reports on April 1, 2005. The prevalence
rate of active influenza as of April 1, 2005, was:

✓ 20 per 1,000 population




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:

✓ 20 per 1,000 population




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?

✓ Rates would increase in women older than 50 years of age but may decrease in younger
women as they get older.




The ability of a single person to remain free of clinical illness following exposure to an infectious agent is
known as:

✓ Immunity




Which of the following reasons can explain why a person who did not consume the infective food item
got sick?

✓ All of the above




Which of the food items (or combination of items) is most likely to be the infective items(s)?

✓ Ice cream only


2

, The case-fatality rate associated with plague is lowest in which community?

✓ Community C




The incidence and prevalence rates of a chronic childhood illness for a specific community are given
below

✓ The duration of disease is becoming longer.




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:

✓ Children ages 5 to 9 had the highest rate of death in all periods




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?

✓ None of the above




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 by age in 2000 (before the law) and in 2005 (4 years
after the law was enacted)

✓ Correct, because both the total and the age-adjusted mortality rates are higher in 2005 than in
2000




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