Statistics Flashcards
1
Q
What is sensitivity?
A
Ability to identify those with true disease; = true pos/(true pos + false neg)
2
Q
What is specificity?
A
Ability to identify those without disease; = true neg/(true neg + false pos)
3
Q
What is positive predictive value?
A
The likelihood patient has disease with a positive result; = true pos/(true pos + false pos)
4
Q
What is negative predictive value?
A
The likelihood that patient does not have disease with a negative result; = true neg/(true neg + false neg)
5
Q
What is accuracy?
A
correct tests/all tests = (TP + TN)/(TP + FP + TN + FN)
6
Q
What is prevalence?
A
A measure of how common a disease is for a certain time period in the population; = total positive/total population