Lisette van Dam

Chapter 4 74 Modified Wells rule in combination with D-dimer testing Recurrent DVT No recurrent DVT Total Likely modified Wells rule and/or abnormal DD 13 34 47 Unlikely modified Wells rule and normal DD 1 16 17 Total 14 50 64 Sensitivity: 93% (95%CI 69-99%) Specificity: 32% (95%CI 21-46%) PPV: 28% (95%CI 23-33%) NPV: 94% (95%CI 70-99%)