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Table 3 Diagnostic accuracy of using Wells score and Caprini score for preoperative DVT

From: Usefulness of clinical predictors for preoperative screening of deep vein thrombosis in hip fractures

  R.R. (95% C.I.) p-value Sensitivity Specificity PPV NPV
Wells score
  ≥ 1 2.42 (0.63–9.29) 0.20 80.0 37.7 20.0 90.6
  ≥ 2 3.62 (1.13–11.54) 0.03* 46.7 80.5 31.8 88.6
  ≥ 3 11.69 (0.99–138.44) 0.05* 13.3 98.7 66.7 85.4
Caprini score
  ≥ 11 2.84 (0.34–23.56) 0.33 93.3 16.9 17.9 92.9
  ≥ 12 7.56 (0.94–60.64) 0.05* 93.3 35.1 21.9 96.4
  ≥ 13 4.00 (1.27–12.61) 0.02* 60 72.7 30 90.3
  ≥ 14 2.16 (0.50–9.30) 0.3 20 89.6 27.3 85.2
  1. R.R. relative risk, C.I. confidence interval, PPV positive predictive value, NPV negative predictive value
  2. *; significant value with p < 0.05
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