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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