Biostatistic

Question 1

Relative risk reduction

Answer 1

(% with event in control group) - (% with event in treatment group) / % with event in control group

Or

1-RR

How much risk is reduced in experimental group compared to control group

Question 2

ABsolute Risk Reduction

Answer 2

(Incidence in the placebo group)-(incidence in the treatment group)

For every 100 patients treated, ___experienxed a reduction in disease progression.

Question 3

Number needed to treat

Answer 3

1/ARR

For every ___patients treated, 1 adverse event is prevented

Question 4

Odds

Answer 4

Probability of an event occurring compared with the probability that it will not occur

Question 5

Hazard ratio

Answer 5

Negative outcome

Question 6

Relative risk

Answer 6

Incidence for exposed subjects/ incidence for unexposed subjects

RR1 means that risk increased with exposure to intervention