Table 1. Baseline characteristics of cases and controls.
Data are reported as means or proportions with associated confidence intervals as well as associated p-values testing for differences between groups.
| Controls (95% CI) |
Cases (95% CI) |
P-Value | |
|---|---|---|---|
| Age, mean | 38.9 (37.8–40.0) |
43.8 (40.1–47.6) |
0.01 |
| Percent women | 80% (77.1–82.6) |
68.3% (58.7–76.6) |
0.01 |
| Clinical signs and symptoms of DVT? | 9.0% (7.3–11.2) |
19.8% (13.2–28.6) |
0.00 |
| Heart Rate >100 | 40.4% (37.1 – 43.8) |
40.6% (31.5–50.3) |
1.00 |
| Immobilization at least 3 days or surgery in the previous 4 weeks | 20.6% (18.0–23.5) |
22.8% (15.7–31.9) |
0.61 |
| Previous, objectively diagnosed PE or DVT | 8.8% (7.0–10.9) |
16.8% (10.8–25.3) |
0.01 |
| Hemoptysis | 3.5% (2.5–5.0) |
6.9% (3.4–13.6) |
0.10 |
| Malignancy with treatment within 6 months or palliative | 10.9% (8.9–13.2) |
16.8% (10.8–25.3) |
0.08 |
DVT = deep vein thrombosis, PE = pulmonary embolism.