rapid review 634 - 641

Question 1

odd ratio is used in what type of study?

Answer 1

case control

Question 2

what is the equation is for odd ratio?

Answer 2

ad / bc

Question 3

equation for relative risk?

Answer 3

a/(a+b) / c/(c+d)

Question 4

equation for attributable risk?

Answer 4

a/(a+b) - c/(c+d)

Question 5

what is attributable risk and in what type of study is it used?

Answer 5

the diff in risk btw exposed and unexposed groups and used in cohort study

Question 6

define relative risk reduction and in type of study is it used?

Answer 6

the proportion of risk reduction attributable to the intervention as compared to a control usually used in cohort studies

Question 7

what is the equation for relative risk reduction?

Answer 7

RRR = 1 - RR

Question 8

eq. for absolute risk reduction?

Answer 8

c/(c+d) - a/(a+b)

Question 9

eq for number needed to treat?

Answer 9

NNT = 1/absolute risk reduction

Question 10

eq for number needed to harm

Answer 10

NNH = 1/attributable risk

Question 11

eq for filtration fraction

Answer 11

FF = GFR / RPF

Question 12

eq for renal blood flow

Answer 12

RBF = RPF / (1-Hct)

Question 13

2 equations for mean atrial pressure

Answer 13

1. MAP = CO X TPR

2. MAP = 2/3 diastolic + 1/3 systolic

Question 14

S4 heart sound is associated with

Answer 14

stiff/hypertrophic ventricle (aortic stenosis, restrictive cardiomyopathy)

Question 15

S3 heart sound is associated with

Answer 15

inc ventricular filling pressure (mitral regurge, HF), dilated cardiomyopathy