3) Measures Of Association And Effect Flashcards Preview

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Flashcards in 3) Measures Of Association And Effect Deck (9)
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1
Q

Prevalence

A

Proportion of a population with an attribute of interest at a specified time

2
Q

Incidence

A
  • number of new cases over a period of time

- measure of risk

3
Q

Cumulative incidence

A
  • # of individuals experiencing a new event during a time period / # of susceptible individuals at the beginning of a time period
4
Q

Incidence density

A
  • # of events in time period / person-time of susceptible individuals at risk during a time period
5
Q

Prevalence = ?

A

Incidence x duration

6
Q

Relative risk

A
  • Incidence in exposed group / incidence in control group
7
Q

Risk difference

A

Risk in exposed group - Risk in unexposed group

8
Q

NNT

A

1 / Risk difference

9
Q

Odds ratio

A

(risk+; Dis+) / (risk- ; Dis +)
_____________________________
(Risk+; Dis -) / (Risk-; Dis -)