1
Q
Point Prevalence
A
of existing cases / population
2
Q
Incidence Risk
A
of new cases / # of healthy people at the beginning of time
Risk = d/n
3
Q
Incidence Rate
A
Rate = d/y
4
Q
Sensitivity
A
Sensitivity = TP/(TP + FN) = TP / total sick people
5
Q
Specificity
A
Specificity = TN/(TN + FP) = TN / total healthy people
6
Q
Positive Predictive Value
A
PPV = TP / (TP + FP) = TP / all positives
7
Q
Negative Predictive Value
A
NPV = TN / (TN + FN) = TN / all negatives
