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Table 4 Logistic regression analysis of DVT

From: Preoperative prevalence of deep vein thrombosis in patients scheduled to have surgery for degenerative musculoskeletal disorders

   Number of patients Number of DVT Rate of DVT (%) Uni-variable analysis Multi-variable analysis
   OR 95% CI p-value OR 95% CI p-value
Age (y) <50 134 1 0.8 0.20 0.02 1.69 0.14 0.24 0.03 2.07 0.20
50-59 166 6 3.6 reference        
60-69 289 19 6.6 1.88 0.73 4.80 0.19 1.46 0.56 3.81 0.44
70-79 467 40 8.6 2.50 1.04 6.01 0.04 1.71 0.69 4.23 0.25
>=80 180 26 14.4 4.50 1.80 11.24 < 0.01 2.83 1.09 7.31 0.03
Sex Men 535 25 4.7 reference        
Women 701 67 9.6 2.16 1.34 3.46 < 0.001 1.82 0.97 3.39 0.06
Group knee 211 31 14.7 2.65 1.47 4.79 0.00 2.12 1.13 3.96 0.02
hip 328 20 6.1 reference        
neck 174 7 4.0 0.65 0.27 1.56 0.33 0.98 0.38 2.49 0.96
low back 523 34 6.5 1.07 0.61 1.89 0.81 1.27 0.68 2.38 0.45
BMI (kg/m2) <18.5 53 7 13.2 1.78 0.76 4.13 0.18     
18.5-24.9 674 53 7.9 reference        
>=25.0 509 32 6.3 0.78 0.50 1.23 0.29     
Smoking No 713 63 8.8 reference        
Yes 523 29 5.5 0.60 0.38 0.95 0.03 1.08 0.60 1.92 0.81
ASA 1 253 6 2.4 reference        
2 856 73 8.5 3.84 1.65 8.93 0.00 2.80 1.15 6.83 0.02
3, 4 104 10 9.6 4.38 1.55 12.39 0.01 3.13 1.04 9.41 0.04
Hypertension No 593 35 5.9 reference        
Yes 643 57 8.9 1.55 1.00 2.40 0.05 0.87 0.54 1.41 0.57
Hyperlipidemia No 936 67 7.2 reference        
Yes 300 25 8.3 1.18 0.73 1.90 0.50     
Diabetes No 974 76 7.8 reference        
Yes 262 16 6.1 0.77 0.44 1.34 0.35     
Stroke No 1,154 86 7.5 reference        
Yes 82 6 7.3 0.98 0.42 2.32 0.96     
Malignancy No 1,090 73 6.7 reference        
Yes 146 19 13.0 2.08 1.22 3.57 0.01 1.85 1.06 3.23 0.03
  1. BMI Body mass index