Nokea
Calculate the percentage decline in the death rate for all causes. What generalizations can be made about changes in disease rates between 1900 and the present?
- A. Death rates declined significantly due to advancements in healthcare.
- B. Death rates increased due to population growth.
- C. Death rates remained constant despite medical advancements.
- D. Death rates fluctuated without clear trends.
Correct Answer: A
Rationale: Death rates have declined significantly since 1900 due to improvements in healthcare, sanitation, and living conditions.
You may also like to solve these questions
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.
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.
A baby is called exclusively breast feed if he/she is breast fed for:
- A. 2-3 month
- B. 3-4 months
- C. 3-5 months
- D. 7-8 months
Correct Answer: B
Rationale: Exclusive breastfeeding refers to feeding only breast milk for the first 6 months of life, typically 3-4 months in the context of this question.
Ideally, a case definition is 100% accurate in identifying who does and does not have the disease in question, but in reality few case definitions achieve this ideal.
- A. TRUE
- B. FALSE
Correct Answer: A
Rationale: Case definitions aim for high specificity and sensitivity but rarely achieve perfection due to diagnostic limitations.
Name the four major classes of pesticides.
- A. Organochlorines, organophosphates, carbamates, pyrethroids.
- B. Antibiotics, antifungals, herbicides, rodenticides.
- C. Insecticides, fungicides, herbicides, acaricides.
- D. Biological agents, synthetic agents, natural agents, chemical agents.
Correct Answer: A
Rationale: The four major classes of pesticides are organochlorines, organophosphates, carbamates, and pyrethroids.