Table 3.
Prevalence of thrombosis risk factors at baseline and thrombotic events during follow up, classed according to HIA status
| Overall (%) | HIA negative (OD < 0.400) (%) | HIA positive (OD ≥ 0.400) (%) | HIA weak positive (OD 0.400–1.000) (%) | HIA positive and HNP > 50% (%) | HIA strong positive (OD ≥ 1.000) (%) | |
|---|---|---|---|---|---|---|
| History of AVTE (baseline)a | 12.75 | 14.10 | 10.00 | 8.50 | 12.12 | 18.20 |
| History of cancer | 8.51 | 9.20 | 7.10 | 6.80 | 3.03 | 9.10 |
| Hypercoagulable stateb | 8.44 | 9.10 | 7.10 | 8.50 | 6.10 | 0.00 |
| Obesity (BMI > 30 kg/m2) | 54.67 | 58.40 | 47.10 | 47.50 | 39.40 | 45.40 |
| Major surgery or pregnancy during follow up | 1.87 | 2.10 | 1.40 | 1.70 | 0.00 | 0.00 |
| Subsequent AVTE | 32.07 | 32.40 | 31.40 | 30.50 | 30.30 | 36.40 |
| Subsequent vascular access thrombosisc | 18.87 | 19.00 | 18.60 | 16.90 | 12.12 | 27.30 |
aIncluding vascular access occlusion (1 event in a HIA negative case), provoked and unprovoked events
bKnown diagnosis of inherited or acquired thrombophilia (antiphospholipid syndrome, essential thrombocythemia, polycythemia vera, protein C/S deficiency); HbSS; amyloidosis; chronic use of medications associated with thrombosis; chronic inflammatory states
cExcluding central venous catheter thrombosis