Table 2. Ottawa Foot and Ankle Rules Point of Care Ultrasound (OFAR-POCUS) algorithm diagnostic characteristics. Sensitivity (SN), specificity (SP), positive predictive value (PPV), negative predictive value (NPV), positive likelihood ratio (+LR), and negative likelihood ratio (-LR) results compared between the POCUS Examiners, who carried out the scan at bedside, with the retrospective expert reviewers.
|
SN |
SP |
PPV |
NPV |
+LR |
-LR |
|
|
POCUS Examiners |
100% (40%-100) |
94% (70%-100%) |
0.80 (0.28, 0.99) |
1.00 (0.78, 1.00) |
16.00(2.40,106.7) |
0 (0.00, n/a) |
|
Expert Reviewers |
75% (19%-99%) |
75% (48%-93%) |
0.43 (0.10, 0.82) |
0.92 (0.64, 1.00) |
3.00 (1.08,8.32) |
0.33(0.06,1.86) |