Reading...
Play button
Play button
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;
20 Cards in this Set
- Front
- Back
|
p value
|
tells you the likelihood of making a type 1 error
|
|
|
t-test
|
determination of differences between the mean of 2 samples
|
|
|
case control
|
odds ratio
|
|
|
cross-sectional studies
|
chi2 square
|
|
|
Type I Error (a error )
|
rejecting the null hypothesis
|
|
|
Type II Error ( b error )
|
failing to reject the null hypothesis
B= 1-power |
|
|
Power
|
capacity to detect a difference if there is one
|
|
|
Cohort Studies
|
prospective
RR AR |
|
|
AR
|
how many more cases in one group?
Incidence rate of exposed group- incidence rate of unexposed |
|
|
RR
|
used only in prospective studies
How much more likely? IR of exposed/IR of unexposed |
|
|
Numbers Neede to Treat ( NNT )
|
How many in general population need to be treated to prevent one case?
Inverse of IR |
|
|
True Positives
|
diseased people who are correctly classified as positives
|
|
|
True Negatives
|
well people who are correctly classidied as negative
|
|
|
False Positives
|
well people misclassified as positive
|
|
|
False Negatives
|
Diseased people who are misclassified as negative
|
|
|
specificity
|
TN/TN + FP
right column proportion of well people who are correctly classified by the screening test SPIN |
|
|
sensitivity
|
with disease - correctly classified
TP/TP + FN Left SNout Rule out well people |
|
|
Negative predictive value
|
TN/TN + FN
How likely it is taht a negative test represent true absence of the condition you are testing |
|
|
Accuracy
|
proportion of all screened people who are correctly classified by the screening test
TP + TN/ TP+TN+FP+FN |
|
|
Prevalence
|
IR x Time
TP + FN/ TP + TN+ FN +FP |
