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Table 2 Distribution of VTE risk factors in DVT patients

From: Comparison of rivaroxaban and parnaparin for preventing venous thromboembolism after lumbar spine surgery

VTE risk factor DVT cases Total cases enrolled (665) Ratio of DVT incidence 2.4 %
Rivaroxaban group (6) LWMH group (10) Sum (16)
Age ≥60 years old 5 7 12 298 4.0 %
BMI ≥30 kg/m2 3 6 9 304 3.0 %
Thrombophilia 4 4 6 201 3.0 %
Diabetics 1 1 2 55 3.6 %
Hypertension 0 1 1 65 1.5 %
Hyperlipidemia 0 0 1 20 5.0 %
Diabetics/hypertension/hyperlipidemia 2 0 2 32 6.3 %
Spinal tumor 1 2 3 29 10.3 %
Previous history of phlebothrombosis 1 0 1 7 14.3 %
Anterior or combined anterior–posterior surgery 0 1 1 16 6.3 %
Spinal trauma 2 3 5 86 5.8 %
Without nerve injury 0 1 1 55 1.8 %
With nerve injury 2 2 4 31 12.9 %