Flashcards in EBM Deck (12)

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1

## What is sensitivity?

###
Measures the proportion of +ve's identified (e.g % of sick people identified as sick).

TRUE POSITIVE RATE

2

## What is specificity?

###
Measure the proportion of -ve's identified (e.g. % of healthy people correctly identified as not sick).

TRUE NEGATIVE RATE

3

## What is the role of CONSORT and STROBE?

### They standardise protocols for designing and reporting studies, increasing the quality

4

## The most important 3 factors when assessing a clinical trial are...

### Validity, results and clinical relevance

5

## Name two systems to help with critical appraisal?

### CASP and CEBM

6

## What 6 criteria should we judge a study on?

### Originality, who, design, bias, blind, statistics

7

## What is the role of GRADE and SIGN?

### Rank evidence quality

8

## When would you use regression and what are the two types?

###
To predict dependant variable from independant

Can correct for confunding variables

Linear- when continous outcomes

Logistic- When binary outcomes

9

## What is the t-test used for?

###
Tests the change in mean between two groups

CONTINUOUS VARIABLE

10

## What is the difference between a paired and unpaired t-test?

###
Paired: Diff between same group before and after

Unpaired: Diff between two groups

11

## What is the chi-squared test used for?

###
Version of t-test to see if expected freq = anticipated frequency

BINARY VARIABLES ONLY

12