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Comparing 700 patients with adenocarcinoma of the esophagus with 1580 healthy people sampled from a population...

Comparing 700 patients with adenocarcinoma of the esophagus with 1580 healthy people sampled from a population register for various exposures.  Risks of this cancer increased. what kind of study is this?

  1. Descriptive
  2. Ecological
  3. Randomized trial
  4. Cohort
  5. Case-control
math   Statistics-And-Probability   
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Answer #1

Comparing 700 patients with adenocarcinoma of the esophagus with 1580 healthy people sampled from a population register for various exposures.  Risks of cancer increased. This is cohort study...

Reason-there is good evidence of an association between exposure and disease from other studies..

Exposure is rare..

Attrition of study population can be minimized..

So this is cohort study

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