Reference no: EM131269148
A school nurse conducted a small study with 10 students to assess the presence or absence of cold symptoms at baseline (day 0) and each of the 10 subsequent days. The letter C in the table below indicates, for each student, when cold symptoms (C) were identified by the school nurse. What was the incidence of new colds in these 10 students during the entire time period of observation?
7/10
5/10
5/8
5/7
What was the period prevalence of colds in these 10 students during the entire time period of observation?
7/10
5/10
5/8
5/7
What was the incidence of new colds through and including day 4?
3/8
5/8
3/10
5/10
What was the point prevalence of colds on day 4
5/7
5/8
5/10
5
What was the point prevalence of colds on day 6?
3/8
6/8
3/10
6/10
What was the period prevalence of colds from day 2 through and including day 6?
5/8
6/8
5/10
6/10
Which of the following should be considered in assessing changes in mortality due to a specific disease?
Changes in diagnostic criteria
Changes in age distribution
Changes in coding
All of the above
Assuming there is a treatment for a condition that prolongs survival without curing it, and that other factors remain unchanged, which of the following statements would be true.
Prevalence will decrease
Prevalence will increase
Incidence will increase
Incidence will decrease
Please refer to Figure 2 to answer questions 9 and 10. Figure 2
Follow-up for Complications after Surgery
An investigator is following up with a group of surgical patients for a particular complication. Five patients are followed for up to two months (60 days). As can be seen in Figure A above, patients A and D did not experience the complication within the period of follow-up, whereas patients B, C, and E did at day 42, 8, and 30 respectively.
What were the total number of person-days in the study?
5
60
80
200
Referencing the chart and problem, in question 9, what was the incidence rate per 1000 person-days?
3
15
60
600
Please refer to Table 1 to answer questions 11 through 15.
POPULATION A
Age Range # Population # Deaths Death Rate
<20 50,000 50
2065 30,000 60
>65 20,000 200
POPULATION B
Age Range # Population # Deaths Death Rate
<20 25,000 25
2065 25,000 50
>65 50,000 500
Table 1. Deaths by age group, Population A and Population B.
Referencing Table 1, what was the crude (overall) death rate per 100,000 for area A?
31
57.5
200
310
Referencing Table 1, what was the crude (overall) death rate per 100,000 for area B?
57.5
310
500
575
Referencing Table 1, what was the age-specific death rate per 100,000 in area A for those 2065 years?
50
60
200
500
Referencing Table 1, using the distribution of the sum of the two populations as the standard population, what was the adjusted death rate per 100,000 for area A?
425
443
532
885
Referencing Table 1, using the distribution of the sum of the two populations as the standard population, what was the adjusted death rate per 100,000 for area B?
425
443
532
885
In an outbreak of botulism there were 50 cases identified (26 in males and 24 in females). A total of 13 deaths (8 in males and 5 in females) were attributed to this outbreak. The case fatality rate among males was:
10%
16%
26%
30.8%
Attachment:- Figures&Tables.rar