Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
formula for PPV |
TP/TP + FP |
|
formula for NPV |
TN/TN + FN |
|
formula for specificity |
TN/(TN+FP) |
|
how does PPV change with disease prevalence? |
increases with increasing prevalence |
|
how does NPV change with disease prevalence? |
decreases with increasing prevalence |
|
formula for number needed to treat (NNT) |
1/ARR |
|
formula for attributable risk percentage (ARP) |
ARP = (RR-1)/RR |
|
formula for attributable risk |
incidence in exposed - incidence in unexposed |
|
relationship between mean, median, and mode in positively skewed distribution (tail to the right) |
mean > median > mode |
|
relationship between mean, median, and mode in negatively skewed distribution (tail to the left) |
mean < median < mode |
|
define susceptibility bias |
subgroup of selection bias that occurs when the treatment regimen selected for a patient depends on the severity of the patient's condition |
|
main measure of association in case-control study |
exposure odds ratio |
|
difference between case control and retrospective cohort studies |
in case control, outcome of interest has already developed |
|
appropriate test to compare two means |
two-sample t-test |
|
type of bias introduced when patients are lost to follow-up |
selection |