Misc. 1

Question 1

Number needed to treat (NNT) =

Answer 1

1/ARR

Question 2

absolute risk reduction (ARR) =

Answer 2

Absolute risk control - Absolute risk treatment

Question 3

Relative Risk (RR) =

Answer 3

Absolute risk of treatment / Absolute risk of control

Question 4

Relative risk reduction =

Answer 4

1 - RR

Question 5

Vaccine efficacy =

Answer 5

(risk in unvaccinated - risk in vaccinated) / (risk in unvaccinated)

Question 6

Tx for bronchogenic cyst

Answer 6

VATS resection

Question 7

Most common cyst of mediastinum

Answer 7

Bronchogenic cyst

Question 8

Syndrome w/ enlarged central airways, impairing cough, and leading to recurrent infection and beonchiectasis

Answer 8

Mounier-Kuhn syndrome

Question 9

Why should DLCO be assessed before nitrogen washout for lung volumes?

Answer 9

Nitrogen washout requires breathing 100% O2

Question 10

Positive predictive value (PPV) =

Answer 10

TP / (TP + FP)

Question 11

Negative predictive value (NPV) =

Answer 11

TN / (TN + FN)

Question 12

True positives =

Answer 12

Sensitivity x Gold std. positives

Question 13

False positives =

Answer 13

(1 - specificity) x Gold std. negatives

Question 14

True negatives =

Answer 14

Specificity x Gold std. negatives

Question 15

False negatives =

Answer 15

(1 - sensitivity) x Gold std. positives