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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

What is ANOVA?

Equivalent t-test for 3 OR MORE GROUPS
Tests difference between the means