From: Analysis of the accuracy of the Wells scale in assessing the probability of lower limb deep vein thrombosis in primary care patients practice
Chi-square test p <0.0001
Number of points on the Wells scale
≤0
1÷2
≥3
Total number of patients
646
302
100
Without Thrombosis
645
283
60
Thrombosis
1 (0.15%)
19 (6.29%)
40 (40%)
95% confidence interval
0.03%÷0.87%
4.06%÷9.62%
30.94%÷49.80%