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Iph2213:Epidemiology Question Paper

Iph2213:Epidemiology

Course:Bachelor Of Science In Public Health

Institution: Meru University Of Science And Technology question papers

Exam Year:2014

INSTRUCTIONS: Answer question one and any other two questions
QUESTION ONE (30 MARKS)
a) Distinguish between descriptive epidemiology and analytical epidemiology.
(2 Marks)
b) What do you understand by the following terms;
i. Preclinical disease. (2 Marks)
ii. Sub-clinical disease. (2 Marks)
iii. Attach rate. (2 Marks)
c) Write down the mathematical expression of the following.
i. Incidence (2 Marks)
ii. Prevalence (2 Marks)
d) Two physicians were asked to classify 100 chest x-rays as “abnormal” or “normal”
independently.
The comparison of their classification is shown in the following table.
Physician 1 Physician 2
Abnormal Normal Total
Abnormal 40 20 60
Normal 10 30 40
Total 50 50 100
i. Calculate overall percent agreement between the two physicians. (3 Marks)
ii. Differentiate between intra subject variation and inter observer variation.
( 2 Marks)
e) Define case fatality rate and state its use. (3 Marks)
f) What do you understand by the term incubation period? (2 Marks)
g) State three factors that determine incubation period of a disease. (3 Marks)
h) i) What are randomized trials? (2 Marks)
ii) What are the uses of random trials? (3 Marks)
2
QUESTION TWO (20 MARKS
a) Explain the epidemiological triad of a disease. Use an appropriate diagram to
illustrate your answer. (12 Marks)
b) Explain the “iceberg” concept of a disease. (8 Marks)
QUESTION THREE (20 MARKS)
Apart from Randomized trials, describe four (4) other epidemiological research designs.
(20 Marks)
QUESTION FOUR (20 MARKS)
Data from hospital records are one of the most important sources of information in
epidemiologic studies.
a) Outline the limitations of using hospital data. (6 Marks)
b) Describe the possible sources of error in interview surveys. (14 Marks)

Iph2213:Epidemiology Question Paper

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