TABLE 1

Baseline characteristics of the 1006 study patients according to type of index event

CharacteristicIsolated PEDVT/PE#p-value
Patients271735
Females152 (56.1)294 (40.0)<0.0001
Age years68 (48–76)67 (51–77)0.8
 ≤5071 (26.2)177 (24.1)0.51
 50–7082 (30.3)252 (34.3)0.53
 >70118 (43.5)306 (41.6)0.56
D-dimer results
 Negative146 (53.9)379 (51.6)0.52
 Positive125 (46.1)356 (48.4)
Type of risk factors
 Idiopathic192 (70.8)576 (78.4)
 Weak risk factors79 (29.2)159 (21.6)0.02
  Minor general, laparoscopic or arthroscopic surgery36
  Hormonal therapy (for contraception or replacement)4882
  Long travel49
  Minor trauma, leg injury, reduced mobility1325
  Hospitalisation in a medical ward1137
Follow-up years1.83 (1.2–2.0)1.9 (1.3–2.0)
  • Data are presented as n, n (%) or median (interquartile range), unless otherwise stated. PE: pulmonary embolism; DVT: deep vein thrombosis. #: patients included in the D-dimer and ULtrasonography in Combination Italian Study (DULCIS) for an index event of DVT with or without PE.