Table 3.
Diagnostic accuracy of using Wells score and Caprini score for preoperative DVT
| 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 |
R.R. relative risk, C.I. confidence interval, PPV positive predictive value, NPV negative predictive value
*; significant value with p < 0.05