Table 1

Clinical characteristics with items of the clinical prediction rules of 993 patients suspected of deep venous thrombosis (DVT) and 484 patients suspected of pulmonary embolism (PE)

CharacteristicPatients suspected of DVT (n=993)Patients suspected of PE (n=484)
Median age, years (range)64 (15–96)49 (13–94)
Male, n (%)423 (42.6)155 (32.0)
Active malignancy <6 months, n (%)64 (6.5)25 (5.2)
Surgery or immobilisation, n (%)57 (5.7)44 (9.1)
Oral contraceptive use, n (%)59 (5.9)n.a.
Absence of leg trauma, n (%)782 (78.8)n.a.
Distension of collateral veins, n (%)231 (23.4)n.a.
Calf swelling >3 cm, n (%)338 (34.0)n.a.
Clinical signs of DVT, n (%)n.a.20 (4.1)
Haemoptysis, n (%)n.a.10 (2.1)
PE most likely diagnosis, n (%)n.a.152 (31.7)
History of VTE, n (%)n.a.99 (20.5)
Heart rate >100 beats/min, n (%)n.a.115 (23.8)
Median score on CPR, points (range)2 (0–7)1.5 (0–7)
CPR score ‘likely’ risk category, n (%)171 (17.2)49 (10.1)
Median D-dimer, ng/mL (range)*660 (100–16900)370 (15–9000)
D-dimer ‘positive’ or >500 ng/mL, n (%)†354 (42.5)105 (23.3)
Diagnosis of VTE‡, n (%)230 (23.2)38 (7.9)
  • *Only counted when a quantitative D-dimer was measured.

  • †% of the patients in whom a D-dimer test was performed.

  • ‡After 3 months of follow-up.

  • CPR, clinical prediction rule; VTE, venous thromboembolism.