Table 1 The mean ± SD and frequency (%) of radiologic features in patients with low-risk and high-risk pulmonary embolism
From: The assessment of acute pulmonary embolism severity using CT angiography features
CTA variables | Patients with Low-risk PE (n = 104) | Patients with high-risk PE (n = 46) | P value |
|---|---|---|---|
Gender | |||
Male, n (%) Female, n (%) | 65 (62.5%) | 32 (69.6%) | 0.404 |
39 (37.5%) | 14 (30.4%) | ||
Age | 51.4 ± 16.6 | 69.3 ± 14.0 | < 0.001 |
PESI | 76.5 ± 21.8 | 120.6 ± 23.4 | < 0.001 |
Obstruction index | 9.4 ± 7.6 | 17.3 ± 7.6 | < 0.001 |
RV (mm) | 38.7 ± 40.7 | 36.9 ± 8.0 | 0.778 |
LV (mm) | 39.2 ± 6.1 | 38.6 ± 7.6 | 0.595 |
Pulmonary trunk size (mm) | 26.5 ± 3.9 | 28.5 ± 4.4 | |
Normal, n (%) | 86 (82.7%) | 24 (52.2%) | < 0.05 |
Abnormal, n (%) | 18 (17.3%) | 22 (47.8%) | |
RV/LV ratio | 1.0 ± 1.3 | 1.0 ± 0.3 | 0.857 |
Backwash contrast, n (%) | |||
Present | 39 (37.5%) | 28 (60.9%) | < 0.01 |
Absent | 65 (62.5%) | 18 (39.1%) | |
Septal morphology, n (%) | |||
Normal | 71 (68.3%) | 20 (43.5%) | < 0.01 |
Abnormal | 33 (31.7%) | 26 (56.5%) | |
Location of embolism | |||
Segmental artery | 48 (46.2%) | 4 (8.7%) | < 0.001 |
Lobar artery | 25 (24%) | 9 (19.6%) | |
Main artery | 31 (29.8%) | 33 (71.7%) | |