Homework Answers
In this case –
|
Screening Test |
Impaired Glucose Tolerance |
Not Impaired |
|
Positive |
17 (True positive) |
13 (False Positive) |
|
Negetive |
8 (False Negetive) |
37 (True Negetive) |
a) Sensitivity of the screening test –
TP/(TP+FN) = 17/25 = 0.68
b) False positive fraction of screening test –
1- specificity = 1 – [TN/(TN+FP)] = 1 – [37/50] = 1- 0.74 = 0.26
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