EBM

Question 1

Sensitivity equation and table:

Answer 1

TP/(TP+FN)

SNOUT

Question 2

Specificity equation and table:

Answer 2

TN/(TN+FP)

SPIN

Question 3

Positive predictive value equation and table:

Answer 3

TP/(TP+FP)

Question 4

Negative predictive value equation and table:

Answer 4

TN(TN+FN)

Question 7

Odds ratio definition and table:

Answer 7

• retrospective
• start with people who have disease, and go backwards to find risk factor

Question 10

Positive Likelihood Ratio equation:

Answer 10

LR+ = Sn / (1-Sp)

Question 11

Negative Likelihood Ratio equation:

Answer 11

LR- = (1-Sn) / Sp

Question 12

Post-test probability =

Answer 12

predictive value

Question 13

Steps in going from pre-test odds to post-test odds:

Answer 13

1. Pre-test odds = pre-test probability / (1-pre-test probability)
2. Pre-test odds x LR = post-test odds
3. Post-test probability = post-test odds / (1+post-test odds)