EVIDENCE BASED MEDICINE

Question 1

Change in body weight is called a confoundeR

Answer 1

it may well be related to change in diet and salt intake, and in itself is related to blood pressure

Question 2

Why is randomization important?

Answer 2

Randomization resulted in the two groups being quite well balanced at baseline in terms of key confounders (e.g. age, sex) as well as eventual outcome measure

Question 3

Nominal

Answer 3

Can count them but not order them

E.g. gender and sex colours

Question 4

Ordinal

Answer 4

Can count them and order them

E.g. house numbers of swimming levels

Question 5

How to calculate 95% reference range?

Answer 5

workout lower end range = mean - 2SD
workout upper end range = mean + 2SD

reference range = lower end to upper end