Table 4 Diagnostic accuracy
From: Mandatory adherence to diagnostic protocol increases the yield of CTPA for pulmonary embolism
CTPA-diagnosed PE | |||
|---|---|---|---|
Yes | No | ||
Wells category | |||
Wells >4 | 44 | 79 | 123 (PPV, 38.8 %) |
Wells ≤4 | 30 | 96 | 126 (NPV, 76.2 %) |
Total | 74 (SE, 59.5 %) | 175 (SP, 54.9 %) | |
D-dimer category (n = 159) | |||
D-dimer high | 50 | 97 | 147 (PPV, 34 %) |
D-dimer low | 0 | 12 | 12 (NPV, 100 %) |
Total | 50 (SE, 100 %) | 109 (SP, 11 %) | |
History of DVT | |||
History of DVT (yes) | 11 | 9 | 20 (PPV, 55 %) |
History of DVT (no) | 63 | 166 | 172 (NPV, 72.5 %) |
Total | 74 (SE 14.9 %) | 175 (SP, 94.9 %) | |
Signs of DVT | |||
Signs of DVT(yes) | 15 | 15 | 30 (PPV, 50 %) |
Signs of DVT (no) | 59 | 160 | 219 (NPV, 73.1 %) |
74 (SE, 20.3 %) | 175 (SP, 91.4 %) | ||