Table 1. Baseline Patient Characteristics:

Demographic and relevant baseline clinical characteristics in the pre-PERT and in the post-PERT eras. Continuous variables are presented as mean ± SD and differences between groups were evaluated by the student’s t-test. Dichotomous variables are presented as frequencies (% of population) and differences between groups were evaluated by Chi-square. COPD = Chronic obstructive pulmonary disease. VTE = Venous thromboembolism.

Variable	pre-PERT (N = 137)	post-PERT (N = 231)	p-Value
Age (years)	63.2 ±15.5	63.9 ±15.5	0.614
Female	66 (48%)	107 (46%)	0.730
Male	71 (52%)	124 (54%)	0.730
COPD	35 (26%)	46 (20%)	0.194
Heart Failure	19 (14%)	31 (13%)	0.903
Major Bleeding	11 (8%)	22 (10%)	0.610
Anticoagulant use	14 (10%)	20 (9%)	0.617
Antiplatelet use	35 (26%)	66 (29%)	0.530
Provoked	91 (66%)	119 (52%)	0.005
Provocation factors
Surgery	18 (13%)	26 (11%)	0.590
Cancer	38 (28%)	52 (23%)	0.259
Hypercoagulable	7 (5%)	4 (2%)	0.109
Immobilization	24 (18%)	25 (11%)	0.068
Prior VTE	22 (16%)	44 (19%)	0.470