Evaluating Role Of DI Flashcards
1
Q
What are the 4 roles of DI
A
Screening of asymptomatic patients
Detection and diagnosis of a disease
Staging
Assessment of change
2
Q
What is diagnostic accuracy
A
Ratio of TP and TN to the totals number of patients
TP+TN/TP+TN+FP+FN
3
Q
What is sensitivity
A
Ability to detect people with the disease
TP/TP+FN
4
Q
What is specificity
A
Ability to detect people without the disease
TN/TN+FP
5
Q
What is positive predictive accuracy
A
The likelihood of a patient with a positive test actually having the disease
PPA= TP/TP+FP X100
6
Q
What is Negative Predictive accuracy
A
The likelihood of a patient with a negative test not having the disease
NPA = TN/TN+FN X 100
7
Q
How can a test improve patient outcome
A
Lesser mortality
Alleviate suffering
Restore health
Prevent symptomatic disease
Predict prognosis
