Preventive Medicine & Community MCQs, Master of Public Health

1. The purpose is to limit the incidence of disease by controlling causes and risk factors
A. Primordial prevention
B. Primary prevention
C. Secondary prevention
D. Tertiary prevention
Answer: B
2. The property of a test to identify the proportion of truly ill persons in a population who are identified as ill by a screening test
A. Sensitivity
B. Specificity
C. Positive predictive value
D. Negative predictive value
Answer: A
3. The probability of a persons having the disease when the test is positive
A. Sensitivity
B. Specificity
C. Positive predictive value
D. Negative predictive value
Answer: C
4. The extent to which a test is measuring what it is intended to measure
A. Reliability
B. Validity
C. Sensitivity
D. Specificity
Answer: B
5. A study that measures the number of persons with influenza in a calendar year
A. Cohort study
B. Case control
C. Cross sectional
D. Case report
Answer: C
6. Stage by which the presence of factors favors the occurrence of disease
A. Stage of susceptibility
B. Stage of presymptomatic disease
C. Stage of clinical disease
D. Stage of disability
Answer: A
7. Modes of horizontal transmission of disease, except
A. Contact
B. Vector
C. Common Vehicle
D. Genetic
Answer: D
8. An infected person is less likely to encounter a susceptible person when a large proportion of the members of the group are immune
A. Active immunity
B. Passive immunity
C. Herd immunity
D. Specific immunity
Answer: C
9. Occurrence in the community of a number of cases of disease that is unusually large or unexpected
A. Endemic
B. Epidemic
C. Pandemic
D. Infection
Answer: B
10. Measures of central tendency, except
A. Mean
B. Median
C. Mode
D. Variance
Answer: D
11. Range of values surrounding the estimate which has a specified probability of including the true population values
A. Standard deviation
B. Standard error
C. Confidence interval
D. Correlation coefficient
Answer: C
12. The probability of rejecting the null hypothesis when it is true
A. Type 1 error
B. Type 2 error
C. Power of a statistical test
D. Level of significance
Answer: A
13. The following are measures of disease frequency, except
A. Incidence rate
B. Prevalence
C. Cumulative incidence
D. Relative risk
Answer: D
14. The proportion of cases of a specified disease or condition which are fatal within a specified time
A. Morbidity rate
B. Case fatality rate
C. Proportionate mortality
D. Death rate
Answer: B
15. The relation between exposure and disease is considered to be causal or etiological in the following, except
A. Dose response relation
B. Cessation of exposure
C. Temporal relation
D. No confounding
Answer: D
16. A study that measures the incidence of a disease
A. Case report
B. Cross sectional
C. Case control
D. Cohort
Answer: D
17. A study wherein bias is less likely to occur
A. Case report
B. Cross sectional
C. Case control
D. Cohort
Answer: D
18. The proportion of disease incidence that can be attributed to a specific exposure
A. Relative risk
B. Odds ratio
C. Attributable risk
D. Potential risk
Answer: C
19. All of the following are potential benefits of a randomized clinical trial, except
A. The likelihood that the study groups will be comparable is increased
B. Self-selection for a particular treatment is eliminated
C. External validity of the study is increased
D. Assignment of the next subject cannot be predicted
Answer: C
20. Recall is an example of what type of bias
A. Selection bias
B. Information bias
C. Confounding
D. Systematic
Answer: B
21. Type of design where both exposure and disease are determined simultaneously for each subject
A. Case study
B. Cross sectional study
C. Case control study
D. Cohort study
Answer: B
22. A study is conducted to determine the proportion of persons in the population with PTB using AFB sputum for diagnosis
A. Case study
B. Cross sectional study
C. Case control study
D. Cohort study
Answer: B
23. Randomization is the best approach in designing a clinical trial in order to
A. Achieve predictability
B. Achieve unpredictability
C. Achieve blinding
D. Limit confounding
Answer: B
24. Type of sampling whereby subjects are assigned according to a factor that would influence the outcome of a study
A. Simple random sampling
B. Systematic sampling
C. Stratified random sampling
D. Cluster sampling
Answer: C
25. The extent to which a specific health care treatment, service, procedure, program, or other intervention produces a beneficial result under ideal controlled conditions is its
A. Effectiveness
B. Efficacy
C. Efficiency
D. Effect modification
Answer: B
26. Leading cause of Diarrheal disease
A. Enterotoxigenic Escherichia coli
B.Salmonella (non-typhoid)
C.Rotavirus
D. Campylobacter jejuni
Answer: C
37. Mammography should be done annually in women of what age?
A. 50 years old. and above
B. 60 years old and above
C. 45 years old and above
D. 30 years old and above
Answer: A
28. APGAR family assessment is interpreted by means of
A. Scoring
B. Comparing with a standard table
C. Using a scale of wellness
D. Consultation with a family psychologist
Answer: A