Evidence Based Medicine

Question 1

What happens to relative risk, when the absolute risk halves?

Answer 1

Nothing

Question 2

NNT is 100, what does this tell us?

Answer 2

It is the no of people who need to take the treatment to re
additional beneficial outcome in one person

Question 3

Examples of quantitive data?

Answer 3

Ratio:
• hight, weight, income - true zero

Interval
• temp in Celsius- no true zero

• Differences between measurements*

Question 4

Examples of qualitative data?

Answer 4

Ordinal
• rankings

Nominal
• pie chart
• colours
• gender