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:
- A. data on comorbidities is not collected.
- B. self-selection of the respondents means that the sample is not representative.
- C. false negative results are common.
- D. there is no further diagnostic system.
- 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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