2024-10-30T04:46:00+03:00[Europe/Moscow] en true <p>What is a <strong>case control study</strong>?</p>, <p>Statistical precision is improved by decreasing the number of controls. True or false?</p>, <p>What is the difference between <strong>probability and odds</strong>?</p>, <p>Define these:</p><p><strong>OR = 1 </strong></p><p><strong>OR &gt; 1</strong></p><p><strong>OR &lt; 1</strong></p> flashcards
Epidemiology, Chp. 7 - Case-control Studies & Cohort Studies

Epidemiology, Chp. 7 - Case-control Studies & Cohort Studies

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  • What is a case control study?

    An observational study assessing the association of an exposure with a disease. Uses cases (people with the disease) and controls (people without the disease).

  • Statistical precision is improved by decreasing the number of controls. True or false?

    False; it's improved by increasing the number, however 4 should be the max.

  • What is the difference between probability and odds?

    Probability - the measurement of how likely someone believes a particular event/action is to occur.

    Odds - the chances in favour of the event to the changes against it.

  • Define these:

    OR = 1

    OR > 1

    OR < 1

    OR = 1 - no association

    OR > 1 - suggests risk; positively associated

    OR < 1 - no association or is a protective factor