A study is conducted to 500 adults regarding their weight andtheir drinking habits. Of the 300 people who are over-weight, 150are heavy drinkers. What kind of study is this?

  1. Cohort study
  2. Case-control study
  3. Ecologic study
  4. Randomized clinical trial

What is the prevalence % of heavy drinkers among those who areover-weight?

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