Descriptive , Ecological And Cross-sectional

Question 1

Ecological fallacy

Answer 1

Trap where associations seen at population level are wrongly assumed to hold at the individual level.

Question 2

Cross-sectional studies

Answer 2

Often thought of as surveys.

The main measure of outcome frequency obtained from this study design is prevalence.

Conducted in a sample of the population

Advantages:

• quicker
• economical

Question 3

Ecological study

Answer 3

Interested in the whole family population and not just a sample.

They can be geographical or temporal for example.

Disadvantages:

• tend to present suggestive rather than compelling evidence of causal relationships.
• ecological fallacy

Question 4

Delete

Answer 4

Prevalen