Table 3 Adjusted odds ratios and 95 % CI between risk factors and VTE status

Age (≥ 65 years versus < 65 years)

0.904

0.585–1.399

0.652

Sex (female versus male)

1.541

0.862–2.755

0.144

Smoking (yes versus no)

1.234

0.633–2.405

0.537

Varicose veins (yes versus no)

0.769

0.367–1.729

0.565

Hypertension (yes versus no)

0.828

0.518–1.326

0.432

Cerebrovascular disease (yes versus no)

1.136

0.616–2.094

0.683

BMI (≥ 28 kg/m² versus < 28 kg/m²)

0.834

0.536-1.300

0.423

SBP (≥ 140mmHg versus < 140mmHg )

1.143

0.720–1.812

0.571

DBP (≥ 90mmHg versus < 90mmHg )

0.976

0.561–1.699

0.932

Operative procedures (TKA versus THA)

2.285

1.287–4.058

0.005

HbA₁c (≥ 7.5 % versus < 7.5 %)

1.232

0.766–1.747

0.273

Preoperative D-dimer (> 0.55 mg/L FEU versus ≤ 0.55 mg/L FEU)

2.109

1.348-3.300

0.001

Postoperative prophylaxis regimens (mechanical prophylaxis versus concomitant mechanical prophylaxis and LMWH)

0.559

0.365–0.855

0.007