How is 'mortality rate' defined?

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Descriptive Epidemiology Questions Questions

Question 1 of 5

A. The number of new cases of a disease B. The total number of existing cases of a disease C. The number of deaths in a population over a specific period D. The number of people who recover from a disease

Correct Answer: C

Rationale: Mortality rate (C) is deaths over time (e.g., 2/1000/year). A is incidence, B is prevalence, D is recovery.

Question 2 of 5

Factors that are more characteristic of childhood-onset asthma than adult-onset asthma include

A. a 2:1 ratio of females to males B. an association with a history of eczema C. normal levels of IgE in the serum D. lack of response to provocation with inhaled antigens

Correct Answer: B

Rationale: Childhood asthma is atopic (eczema, high IgE—B true, C false). A is false (male predominance). D and E are false (responsive, seasonal).

Question 3 of 5

Correct statements concerning breast-feeding include which of the following?

A. The incidence of infections is greater in breast-fed than in bottle-fed infants B. Breast milk is frequently insufficient in quantity C. Iron deficiency anemia is less frequent in infants fed cow's milk than in breast-fed infants D. Significant quantities of immunoglobulins are provided by breast milk

Correct Answer: D

Rationale: Breast milk provides IgA, reducing infections (A false). B is rare. C is false (cow’s milk worse for iron).

Question 4 of 5

Which of the following statements about valvular heart disease is true?

A. Coronary artery disease is the most common cause of aortic stenosis in the U.S. B. The incidence of rheumatic heart disease in the U.S. has been rising for the past 10 years C. Most persons with a history of rheumatic fever are immune to recurrences during group A streptococcal epidemics D. Most cases of mitral valve prolapse are asymptomatic

Correct Answer: D

Rationale: MVP is often asymptomatic; A (calcification), B (declining), C (false) incorrect.

Question 5 of 5

Compared with the general population, all the following patients are at an increased risk of folate deficiency EXCEPT

A. a 20-year-old man with sickle cell anemia B. a 20-year-old woman who is a strict vegetarian C. a 60-year-old man on hemodialysis D. a 70-year-old woman who drinks a quart of vodka each day

Correct Answer: B

Rationale: Vegetarians get folate from plants; others at risk (hemolysis, malabsorption, alcohol).

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How is 'mortality rate' defined?

Nurselytic

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Descriptive Epidemiology Questions Questions

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