These studies allow to measure the effect of aggregate measures of exposure when measurement are not available at individual level or difficult to obtain?
A) Case control studies
B) Cohort studies
C) Case study
D) Ecological studies
Correct Answer:
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Q232: Which of the following statements is Incorrect?
A)
Q233: Which of the following is a measure
Q234: A double blind randomized controlled trail was
Q235: John established a study to investigate the
Q236: All of the following can be considered
Q238: Public health surveillance is?
A) Used to guide
Q239: Which of the following statement/s would best
Q240: If the relative risk value is less
Q241: A double blind randomised controlled trail was
Q242: Which of the following statement/s is/are best
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