Stats :(((

Question 1

NNT

Number needed to treat

Answer 1

1/ARR

Expressed as whole people

Question 2

ARR

absolute risk reduction

Answer 2

CER - EER

The difference between the event rate in the treatment group and the event rate in the control group

(expressed as their percentage e.g. 40 people in 800 = 0.05 vs 120 people in 1200 = 0.1 therefore ARR = 0.05)

Question 3

Coefficient used to measure correlation between two sets of variables/ data which are normally distributed

(i.e. parametric data)

Answer 3

Pearsons coefficient

Question 4

Coefficient used to measure correlation between two sets of variables/ data which ARE NOT normally distrubuted

(i.e. non-parametric data)

Answer 4

Spearmans coefficient

Question 5

What type of test compares two sets of observations on a single sample

e.g. BP ‘before’ and ‘after’ taking a anti-hypertensive

Answer 5

Wilcoxon signed-rank test

Question 6

Relative risk

Answer 6

Experimental event rate / control event rate

Question 7

Likelihood ratio for a positive test result

Answer 7

Sensitivity / (1 - specificity)

Question 8

Likelihood ratio for a negative test result

Answer 8

(1 - sensitivity) / specificity

Question 9

Relative risk REDUCTION

Answer 9

CER - EER / CER