Table 3: Infrequency Index (CII) Operating Characteristics at Various Cut Scores.
|
|
Cut Score |
Sn |
Sp |
PPP |
NPP |
Hit Rate |
IPPP |
INPP |
|
Overall CII |
³ 21 |
0.36 |
0.85 |
0.44 |
0.80 |
0.73 |
0.19 |
0.05 |
|
|
³ 22 |
0.32 |
0.89 |
0.49 |
0.80 |
0.75 |
0.24 |
0.05 |
|
|
³ 23 |
0.26 |
0.96 |
0.68 |
0.80 |
0.79 |
0.43 |
0.05 |
|
Paper CII |
³ 21 |
0.34 |
0.85 |
0.43 |
0.79 |
0.72 |
0.18 |
0.04 |
|
|
³ 22 |
0.26 |
0.85 |
0.37 |
0.78 |
0.70 |
0.12 |
0.03 |
|
|
³ 23 |
0.20 |
1.00 |
1.00 |
0.79 |
0.80 |
0.75 |
0.04 |
|
Online CII |
³ 21 |
0.39 |
0.86 |
0.48 |
0.81 |
0.74 |
0.23 |
0.06 |
|
|
³ 22 |
0.39 |
0.93 |
0.65 |
0.82 |
0.80 |
0.40 |
0.07 |
|
|
³ 23 |
0.32 |
0.93 |
0.60 |
0.80 |
0.78 |
0.35 |
0.05 |
Note. Sn = sensitivity; Sp = specificity; PPP = positive predictive power; NPP = negative predictive power; IPPP = incremental positive predictive power; INPP = incremental negative predictive power.