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Table 2 Multivariate logistic regression analysis for risk factors associated with pre-admission DVT

From: Clinical predictors for deep vein thrombosis on admission in patients with intertrochanteric fractures: a retrospective study

Risk factors

Adjusted Odds Ratio(95%CI)

P Value

Age (years)

1.014 (0.987–1.043)

0.304

Gender

 Male

1.0(reference)

 

 Female

1.634 (1.057–2.527)

0.027*

BMI (kg/m2)

  

  < 30

1.0(reference)

 

  > 30

2.022 (0.880–4.648)

0.097

Injury mechanism

 Low energy trauma

1.0(reference)

 

 High energy trauma

2.451 (1.348–4.458)

0.003*

Time from injury to admission (days)

1.377 (1.249–1.519)

< 0.001*

Hemoglobin(g/L)

0.975 (0.965–0.986)

< 0.001*

Comorbidities

 Diabetes

1.866 (1.248–2.791)

0.002*

 COPD

2.229 (1.289–3.855)

0.004*

 Atrial fibrillation

1.735 (0.935–3.217)

0.080

 Cerebrovascular accident

1.304 (0.819–2.076)

0.263

 Dementia

1.838 (0.825–4.096)

0.136

 Varicose veins

1.802 (0.882–3.682)

0.106

Age-adjusted CCI

0.873 (0.717–1.062)

0.174

ASA classification

 

0.092

 1

1.0(reference)

 

 2

3.130 (0.691–14.172)

0.139

 3

4.835 (1.031–22.680)

0.046*

 4

3.495 (0.333–36.682)

0.297

AO classification

  

 A1

1.0(reference)

 

 A2

1.303 (0.796–2.135)

0.293

 A3

3.287 (1.700–6.355)

< 0.001*

  1. The multivariable regression analysis used backward selection with use of the likelihood ratio test to assess significance
  2. Abbreviations: DVT Deep vein thrombosis, BMI Body mass index, COPD Chronic obstructive pulmonary disease, CCI Charlson Comorbidity Index, ASA American Society of Anaesthesiologists, AO Arbeitsgemeinschaft fur Osteosynthesefragen, CI Confidence interval
  3. *The difference was significant