Table 1. Modified risk stratification model for cancer-associated VTE in the ambulatory setting (Khorana Thromboembolic Risk Score).
| Patient characteristic | Score |
|---|---|
| Cancer Very high risk: stomach, pancreas a High risk (lung, lymphoma, gynaecologic, bladder, testicular, renal tumours) |
2 1 |
| Pre-chemotherapy platelet count ≥ 350,000/μL | 1 |
| Haemoglobin level < 10 g/dL or use of red cell growth factors | 1 |
| Pre-chemotherapy leukocyte count > 11,000/μL | 1 |
| Body mass index ≥ 35 kg/m 2 | 1 |
| Calculate total score, adding points for each criterion in the model b | |
Abbreviation: VTE, venous thromboembolism.
a
In the very high-risk category, primary brain tumours were removed because patients with known brain tumours are excluded from study inclusion.
b
Patients at high risk for VTE had a baseline risk score ≥2.
Source: Adapted from Khorana et al. 16