Question 56 · LEK · Characteristics of scientific studies

The data on the number of the cases of X disease obtained in surveys carried out during health festivities is of little value as far as epidemiology and the disease spreading are concerned because:

  1. A. data on comorbidities is not collected.
  2. B. self-selection of the respondents means that the sample is not representative.
  3. C. false negative results are common.
  4. D. there is no further diagnostic system.
  5. E. most diseases are rare in the population.
Hint

Ask yourself who chooses to come to a health fair and fill in a survey, and whether such people resemble the general population.

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