Prognosis of patients with suspected pulmonary embolism in Buenos Aires: a prospective cohort study

BMC Pulmonary Medicine

Table 2 Risk factors by group

	Confirmed PE	Ruled out PE	p
	n = 504% (n)	n = 1232% (n)	p
Central venous catheter	10% (50)	10% (114)	0.69
Recent major surgery (<30 days)	30% (150)	23% (276)*	0.001
Active cancer disease	40% (201)	40% (487)	0.89
Prior VTE event	16% (78)	10% (121)*	0.014
Immobilization within 4 weeks	64% (304)	64% (732)	0.98
Pharmacological thromboprophylaxis^$	14% (70)	20% (241)*	0.03
Recent trauma (<30 days)	8% (39)	6% (76)	0.24
Unprovoked	9.9% (50)	11.7% (144)	0.29
Medical reason for hospitalization	31% (55)	34% (165)	0.5
OC/HRT	2% (8)	2% (19)	0.94
Recent travel >6 hours	11% (54)	10% (116)	0.43

^$The use of pharmacologic thromboprophylaxis was defined as the use of low molecular weight heparin, unfractioned heparin (UFH) or fondaparinux (2.5 mg once daily) before being evaluated for suspected PE. *p < 0.05. Categorical variables were compared with the Chi² test and continuous variables with the Mann Whitney U test. Abbreviations: OC Oral contraceptives, HRT hormone replacement therapy.

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