EBM/research

Question 1

Sensitivity:
- definition
- formula
- What does high sensitivity mean?

Answer 1

Def: Probability of a positive test (eg US) if the pt has the disease (eg appendicitis)
Formula: True + / True Total (true + and -)
High sensitive test means negative = effectively rules OUT. (SNout)

Question 2

Specificity :
- definition
- formula
- What does high sensitivity mean?

Answer 2

Probability of a negative test (eg US) if the pt does not have the disease (eg no appendicitis)
True - / True - and False +
High specific test means positive = effectively rules IN. (SPin)