Measures of assurance and why we use them

Question 1

What are measures of association

Answer 1

mathematical assessment of relationship among given exposure (detemrinant) and the outcome (dz)

**Analytical studies used **

**Different measures are calculated for different types of studies **

Question 2

WHat comparisons are used to measure association?

Answer 2

exposure groups outcome groups

Question 3

What studies compare exposure in dzed groups vs non dzed groups?

Answer 3

1. case control

**​​- **determine assoc. of exposure and dz

1. **cross sectional studies **

- ​estimate prevalence

• evaluate exposure

Question 4

what are odds used for ?

Answer 4

measures exposure in dzed and non dzed groups

expressed as ratio

Example

if 10 cows dz and 3 were exposed

odds of exposure in dz group is **3 / 7 **