Nokea
Identify the type of study design described: Fifteen hundred adult men who worked for Lockheed Aircraft were initially examined in 1951 and were classified by diagnostic criteria for coronary artery disease. Every three years they have been reexamined for new cases of the disease; attack rates in different subgroups have been computed annually.
- A. Cohort study
- B. Case-control study
- C. Cross-sectional study
- D. Ecological study
Correct Answer: A
Rationale: This ongoing follow-up represents a cohort study monitoring disease incidence.
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Vaccine that should be kept in freezer are
- A. Polio, DPT, measles
- B. Polio measles BCG
- C. BCG DPT measles
- D. BCG DPT and polio
Correct Answer: A
Rationale: Polio vaccines must be stored frozen to maintain their efficacy; other vaccines like DPT and measles require refrigeration but not freezing.
The fraction 50 / 53 is a/an:
- A. Attack rate
- B. Food-specific attack rate
- C. Incidence proportion
- D. Proportion
Correct Answer: A
Rationale: This fraction represents the attack rate among those exposed to wedding cake.
M.S in Public Health in IOM was stopped in
- A. 1996
- B. 1997
- C. 1998
- D. 1999
Correct Answer: A
Rationale: The MS in Public Health program at IOM was discontinued in 1996.
Male and female rats experimented with 4 different drugs, then which of the following study is conducted.
- A. chi square test
- B. z test
- C. t test
- D. none
Correct Answer: A
Rationale: Chi-square tests assess associations between categorical variables, useful here for analyzing drug effects across genders.
Estimate how likely it would be for a similar epidemic of plague to develop during the current decade.
- A. Unlikely due to modern sanitation and antibiotics.
- B. Likely due to increased travel.
- C. Likely due to climate change.
- D. Unlikely due to genetic immunity.
Correct Answer: A
Rationale: Modern healthcare, sanitation, and antibiotics significantly reduce the likelihood of a plague epidemic.