From: Economic evaluation of a clinical protocol for diagnosing emergency patients with suspected pulmonary embolism
Control n = 185
Intervention n = 745
Absolute risk difference
Pearson Chi-Square Statistics (df = 1)
P-value
D-dimer
54.1%
93.2%
48.9%
181.5
<0.0001
VQ
70.3%
52.9%
-17.4%
18.2
LLUS
20.5%
17.6%
-2.9%
0.87
0.4
CTPA
9.2%
8.1%
-1.1%
0.25
0.6