A Randomised, Placebo‐controlled Trial Was Conducted in Indonesia to Study

question 9

Multiple Choice

A randomised, placebo‐controlled trial was conducted in Indonesia to study the effects of vitamin A in preventing deaths among children with measles.The investigators
Reported a relative risk of 0.60 for the intervention versus control group.This means
That:

• A)Children receiving vitamin A were 40% less likely to die from measles than children receiving placebo
• B)Children receiving vitamin A were 60% less likely to die from measles than children receiving placebo
• C)The chance of dying from measles in the placebo group was 60%
• D)60% of the children who died received vitamin A; the other 40% received placebo
• E)None of the above statements is true

---

Definitions:

Microsystem

In ecological systems theory, the immediate environments with which an individual interacts, such as family and school.

Mesosystem

A term from Bronfenbrenner's ecological systems theory referring to the interconnections between the microsystems, or the immediate environments, in a person's life.

Macrosystem

A term in ecology and sociology referring to the broadest level of the environment, encompassing cultural values, laws, and societal norms.

Exosystem

A concept in ecological systems theory referring to the larger social systems that indirectly influence an individual, such as community structures or governmental policies.