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Table 3 Comparison of caprini risk factors between non-DVT group and DVT group

From: The application of Caprini Risk Assessment Model in evaluation of deep vein thrombosis for patients with end-stage osteoarthritis before arthroplasty

Relative Risk Factors Risk Score Non-DVT
(n, %)
DVT
(n, %)
P value
Age  ≤ 40 yrs - 5, (0.29) 0, (0.00) 0.012*
41–60 yrs 1 241, (14.11) 6, (6.00)
61–74 yrs 2 1098, (64.29) 61, (61.00)
 ≥ 75 yrs 3 364, (21.31) 33, (33.00)
Visible varicose veins 1 45, (2.63) 2, (2.00) 0.698
History of inflammatory bowel disease 1 2, (0.12) 0, (0.00) 0.732
Swollen legs (current) 1 2, (0.12) 1, (1.00) 0.035*
BMI, 25–40 kg/m2 1 1189, (69.61) 60, (60.00) 0.043*
Lung disease (eg, emphysema or COPD) 1 17, (1.00) 0, (0.00) 0.316
Other risk factors (< 1 mo) BMI, ≥ 40 kg/m2 1 6, (0.35) 0, (0.00) 0.553
Smoking 1 71, (4.16) 2, (2.00) 0.287
Diabetes requiring insulin 1 45, (2.63) 4, (4.00) 0.414
For women only Current use of birth control or hormone replacement therapy(HRT) 1 4, (0.23) 0, (0.00) 0.628
Current or past malignancies 2 57, (3.34) 3, (3.00) 0.855
History of blood clots 3 9, (0.53) 7, (7.00)  < 0.001*
Total score - 2.96 ± 0.96 3.28 ± 1.33 0.022*
  1. DVT Deep venous thrombosis, BMI Body mass index, COPD Chronic obstructive pulmonary disease, yrs years, mo month
  2. χ2test to analysis the incidence of perioperative DVT in different age groups
  3. The values are given as the mean ± standard deviation
  4. * < 0.05 was considered statistically significant