Flashcards in Ethics and biostats Deck (42)

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1

## type of study that measures disease prevalence

### cross-sectional

2

## type of study that measures the odds ratio

### case control

3

## study that measures relative risk

### cohort

4

## sensitivity equation

### TP/(TP+FN) or A /A+C

5

## specificity equation

### TN /TN+FP or D/B+D

6

## PPV equation

### TP/TP +FP or A/A+B

7

## NPV equation

### TN/TN+FN or D/D+C

8

## draw the double bell curve of sens/spec

### TN/FN/FP/TP

9

## What likelihood ratios are significant?

### LR+ > 10 and LR - <0.1

10

## LR + equation

### sensitivity/1-spec or TP rate/FP rate

11

## LR - equation

### 1-sens/spec or FN rate/TN rate

12

## increased sensitivity does what to a predictive value

### increase NPV

13

## decreased specificity does what to a predictive value

### decrease PPV

14

## increased specificity does what to a predictive value

### increase PPV

15

## decreased sensitivity does what to a predictive value

### decrease NPV

16

## OR equation

### a/b / c/d = ad/bc

17

## RR equation

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

18

## RR = 1 means

### no association

19

## RR >1

### increased risk

20

## RR <1

### decreased risk

21

## difference in risk between exposed and unexposed groups

### attributable risk

22

## AR equation

### a/ a+b - c/c+d

23

## the difference in risk attributable to the intervention compared to the control

### ARR

24

## RRR equation

### RRR = 1-RR

25

## the proportion of risk reduction attributable to the intervention as compared to the control

### RRR

26

## ARR equation

### c/c+d - a/a+b

27

## NNT equation

### 1/ARR

28

## NNH equation

### 1/AR

29

## bias when study pop is from hospital and less healthy

### berkson bias

30