Abstract P147 Table 1
CTPAs
+ve for PE
-ve for PE
Positivity rate
Total
1094
278
816
25.4%
Low risk
56
12
44
21.4%
Medium risk
763
169
594
22.1%
High risk
275
97
178
35.3%
<4 PE unlikely
261
50
211
19.1%
>4 PE likely
833
228
605
27.4%