FINAL EXAM NATIONAL BOARD OF EXAMINATIONS
DECEMBER 2017
FIELD EPIDEMIOLOGY
PAPER I

POSSESSION/USE OF CELL PHONES OR ANY SUCH ELECTRONIC GADGETS IS NOT PERMITTED INSIDE THE EXAMINATION HALL.
Time 3 hours FIELD/D/17/50/I
Max. Marks 100
Important instructions:
• Attempt all questions in order.
• Each question carries 10 marks.
• Read the question carefully and answer to the point neatly and legibly.
• Do not leave any blank pages between two answers.
• Indicate the question number correctly for the answer in the margin space.
• Answer all the parts of a single question together.
• Start the answer to a question on a fresh page or leave adequate space between two
answers.
• Draw table/diagrams/flowcharts wherever appropriate.
Write short notes on:
1. Define epidemiology. What are various tools of
measurement used in epidemiology? Explain with suitable
examples.

2. Measurement of morbidity and sources of morbidity
statistics.
6+4
3. Time trends in disease occurrence, explain with examples.
10
4. Design and potential biases in a Cohort study
When is a Cohort study warranted?

5. Odds ratio in a Cohort and case control study and its
interpretation

6. What is non-randomized trials, explain with suitable
example?
10
7. Problems in assessing the sensitivity and specificity of
screening tests and cost benefit analysis of screening.
6+4
8. Closed population and open populations
5+5
9. Association and causation
5+5
10. Concepts of ecological measurement, rationale and
inference of ecologic studies