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## Read the summary and the most important questions on Advanced research methods

• ### 1.1 Descriptive statistics

This is a preview. There are 5 more flashcards available for chapter 1.1

• #### What are the five descriptive statistics?

1. Mean
2. Median
3. Standard deviation
4. Percentiles
5. proportions
• ### 1.2 Measures of association

This is a preview. There are 15 more flashcards available for chapter 1.2

• #### What is a positive corelation?

It indicates the extent to which those variables increase or decrease in parallel.
• #### What is a sample proportion?

The amount of the sample that shares a commonality relative to its whole.
• #### What is the relative risk / risk ratio (RR)?

It is the ratio of the probability of an outcome in an exposed group to the probability of an outcome in an unexposed group.
• #### Which three measures together measure the association between the exposure and the outcome?

1. Relative risk / risk ratio
2. Odds ratio
3. Risk difference
• #### What is the risk difference (RD)

It is the difference between the risk of an outcome in the exposed group and the unexposed group.

I.e. Excess risk / attributable risk
• #### How do we compute the risk difference? (RD)

It is computed as I{e} - I{u}
• I{e} = incidence in the exposed group
• I{u} = incidence in the unexposed group
• #### What is the absolute risk reduction (ARR) and what is it computed as?

If the risk of an outcome is increased by the exposure.
Computed as I{u} - I{e}

• part of risk difference
• #### How to inverse the absolute risk reduction (ARR) and how to inverse the absolute risk increase (ARI)?

ARR: the number needed to treat
ARI: increase the number needed to harm.
• #### What is an odds ratio (OR)?

A statistic that quantifies the strength of the association between two events, A and B.
PLEASE KNOW!!! There are just 75 flashcards and notes available for this material. This summary might not be complete. Please search similar or other summaries.