An ecological study focuses on groups of people and examines the ...

[michelleunicorn]

An ecological study focuses on groups of people and examines the relationship between exposure and disease.
 a. True
  b. False
  Indicate whether the statement is true or false

Question 2

Prospective cohort studies use existing longitudinal data to look back for a temporal relationship between exposure factors and outcome development.
 a. True
  b. False
  Indicate whether the statement is true or false

[perkiness]

Answer to Question 1

True

Answer to Question 2

False