I need help with these questions ASAP. Thank You! Also If you can show the math
ID: 3047687 • Letter: I
Question
I need help with these questions ASAP. Thank You! Also If you can show the math for the questions that would be greatly appreiciate it. Again, thank you.
QUESTION 1
Measures of incidence provide useful descriptive information to:
identify the duration of disease in a population
determine the risk for disease
identify the overall burden of disease in a population
identify mortality related to disease across population sub-groups
characterize person, place, and time factors related to existing disease
0.25 points
QUESTION 2
Of 3000 employees at a given factory, 275 experienced an injury while on the job in a given week. 25 of these injuries were so severe that the employees were not able to return to work and were classified as being severely disabled. Of the 3000 employees, 722 were on vacation that week, 2200 worked full-time (40 hours) and 78 worked part-time (20 hours). What is the best way to characterize the crude incidence rate of severe injury in the given week?
275/2200
275/3000
25/2200
25/3000
25/2278
0.25 points
QUESTION 3
The incidence of disease X is 30 cases per 100,000 population at risk per year. The prevalence of disease X is about 1 case per 100 persons in the population. Roughly, about how many years does this disease last?
40
50
10
3
33
0.25 points
QUESTION 4
Consider the following information for the question:
The population of Columbia on June 30, 2007 was 242,000 people. In 2007, there were 2340 new cases of hepatitis C identified through a passive surveillance system. A survey of the community estimates that there were 6410 persons living with hepatitis C in 2007. Long-term health issues can develop from chronic hepatitis C infection. Cirrhosis of the liver develops in 10 percent to 20 percent of persons with chronic hepatitis C over a period of 20-30 years, and liver cancer in 1 percent to 5 percent. A cancer registry identified 33 hepatitis C-related liver cancer cases in Columbia in 2007. The cancer was confined to the liver in all of these cases. Chronic hepatitis C is the most common reason for liver transplantation among adults.
What is the period prevalence rate of hepatitis C in Columbia in 2007?
9.7 per 1000 population
26.5 per 1000 population
6410
42.3 per 100,000 population
13.6 per 100,000 population
0.25 points
QUESTION 5
Consider the information in the following table and answer the question that follows:
Number and Rate of Ectopic Pregnancy by Year, United States, 1970-1994
Which of the following measures is the best measure to characterize the importance of ectopic pregnancy in the United States in 1990-94?
age-specific prevalence rate
age-adjusted prevalence rate
period prevalence rate
gender-specific prevalence rate
crude prevalence rate
0.25 points
QUESTION 6
Imagine you visit a community of 3000 people in January and find out that 56 people have been suffering from malaria. In June, you visit the same community again and find that 80 more people have contracted the disease since the previous time, and that 25 of the original individuals with malaria have died. All died in February. Assume that births and deaths (other than those from malaria) are equal to each other in this community.
What is the point prevalence of malaria in January?
56/ 3000
80/3000
136/ 2975
56/ 2975
136/ 3000
0.25 points
QUESTION 7
An extremely contagious infectious disease which, thankfully, is self-limiting and confers lifetime immunity, attacks a school with 1200 students. The incidence density rate for the outbreak, which begins the first week of school, remains constant throughout the school year at 1 new case per hundred uninfected students per week. By the end of the forty-week school year, how many students would you expect to have contracted the disease?
136
634
520
396
480
0.25 points
QUESTION 8
Which of the following items are needed to calculate an overall age-adjusted mortality rate in Town X using the direct method of adjustment?
the cause-specific mortality rates for Town X
the population of Town X
age-specific mortality rates for the standard population
the crude mortality rate for Town X
age-specific mortality rates for Town X
a.identify the duration of disease in a population
b.determine the risk for disease
c.identify the overall burden of disease in a population
d.identify mortality related to disease across population sub-groups
e.characterize person, place, and time factors related to existing disease
Explanation / Answer
Incidence is # of new cases or events occurring in a defined population in a specified period of time. Provides us with risk of getting disease in individuals who are not yet infected, not in actual cases.
Hence based on its definition answer is:
Measures of incidence provide useful descriptive information to:
b. determine the risk for disease