Ch. 3

An epidemiologist decides to investigate the incidence of diabetes in a population of 300 older adults who live in the nursing home. She visits the nursing home in January 1, 2017 and later in December 31 of the same year. She looks into the records of these patients and learns that in her first visit, 25 patients had diabetes and 35 in her second visit. What number should be included in the denominator for her calculation of incidence? a)10 b)25 c)35 d)300 e)275

a)10

Suppose that the incidence of all types of cancer remains constant in a given country. However thanks to new treatments, the survival of cancer patients increases. What do you expect to happen to the prevalence of cancer in that country? a)Increase b)decrease c)remain constant d)cannot be determined e)duplicate

a)Increase

What is the incidence rate form influenza in the 2016 season in the young age group at Minas Tirith? (TABLE) a) 3000 cases b) 150 cases/1000 people c)1000 cases d) 100 cases/1000 people e)15 cases/1000 people

b) 150 cases/1000 people

Which of the following statements is the most accurate definition? a)Active surveillance often gathers disease data from all potential reporting health care providers. b)Passive surveillance provides stimulus to health care providers in the form of individual feedback or other incentives. c)Sentinel surveillance is a type of surveillance based on selected population samples chosen to represent the relevant experience of particular groups. d)Active surveillance is continuous analysis, interpretation, and feedback of systematically collected data, generally using methods distinguished by their practicality, uniformity, and rapidity rather than by accuracy or completeness. e)Passive surveillance is an observational investigation, usually descriptive, in which information is systematically collected.

c)Sentinel surveillance is a type of surveillance based on selected population samples chosen to represent the relevant experience of particular groups.

An epidemiologist decides to investigate the incidence of diabetes in a population of 300 older adults who live in the nursing home. She visits the nursing home in January 1, 2017 and later in December 31 of the same year. She looks into the records of these patients and learns that in her first visit, 25 patients had diabetes and 35 in her second visit. What number should be included in the denominator for her calculation of incidence? a)10 b)25 c)35 d)300 e)275

e)275

In the student's health clinic of a certain university, 140 cases of foot-hand-mouth disease were identified among the undergraduate students. This viral infection is usually mild, and none of the students got any complication. Because it is rare to observe this condition in people older than 10 years, the university to interview and examine all the infected students and their contacts. By sending the three officers, what type of surveillance was implemented by the city health department in response to the university's report? a)Sentinel b)Periodic c)Systematic d)Passive e)Active

e)Active

At an initial examination in Baltimore, Maryland, disease X was found in 10 of 1000 men aged 40 to 50 years and in 10 of 2000 women aged 30 to 40 years. Which of the following statement is the most accurate inference for the risk of developing disease X? a)Men have a 2 times greater risk of developing disease X than women. b)Women have a 2 times greater risk of developing disease X than men. c) People aged between 40 and 50 years have a 2 times greater burden of developing disease X than people aged between 30 and 40. d)People aged between 30 and 40 years have a 2 times greater burden of developing disease X than people aged between 40 and 50. e)We cannot make an inference of risk of developing disease X

e)We cannot make an inference of risk of developing disease X