Table 2 .
Results of univariate analysis comparing demographic, vital signs and derived variables, grouped by CT-A outcome (positive/negative)
| Variable | CT-A positive n=9 |
CT-A negative n=83 |
p-value |
|---|---|---|---|
| Age | 83 (65–90) | 73 (67–81) | 0.511 |
| Gender male – n (%) | 8 (89) | 57 (69) | 0.199 |
| HR at time of CT-A | 89 (85–103) | 82 (72.5–98.5) | 0.378 |
| Sys BP at time of CT-A | 111 (99.0–115) | 117 (105–133) | 0.152 |
| SI at time of CT-A | 0.860 (0.760–0.970) | 0.700 (0.570–0.835) | 0.132 |
| Age SI at time of CT-A | 64.5 (20.8) | 54.2 (17.8) | 0.112 |
| NEWS2 at time of CT-A | 6.00 (5.00–10.00) | 5.00 (3.00–6.00) | 0.102 |
| SEWS at time of CT-A | 4.00 (2.00–5.00) | 3.00 (2.00–3.00) | 0.133 |
| HR highest | 106 (102–120) | 95.5 (78.8–107) | 0.289 |
| Sys BP lowest | 83 (81–94) | 93.5 (87.0–104) | 0.429 |
| SI highest | 1.00 (0.860–1.14) | 0.80 (0.625–0.985) | 0.247 |
| Age SI highest | 80.7 (49.1–96.0) | 55.7 (46.1–75.4) | 0.222 |
| NEWS2 highest | 5.00 (3.50–6.50) | 4.00 (2.00–7.00) | 0.102 |
| SEWS highest | 3.00 (1.75–4.25) | 1.00 (1.00–3.00) | 0.133 |
All data quoted as median (IQR) to three significant figures.
Age SI = age×shock index; CT-A = CT angiography; HR = heart rate; IQR = inter-quartile range; NEWS2 = National Early Warning Score 2; SEWS = Standardised Early Warning Score; Sys BP = systolic blood pressure; SI = shock index.