Table 2.

Codification values for Nonnumerical Variables.

Factor	ANN Input Value
Sex	Male = 1; Female = −1
Pulmonary embolism	Yes = 1; No = −1
Site of thrombosis	Right inferior member = 1
	Left inferior member = −1
Proximal or distal lower limb thrombosis	Proximal = 1; Distal = −1
Provoked or unprovoked	Provoked = 1; Unprovoked = −1
Anticoagulant use	Yes = 1; No = −1
FV Leiden	Negative = 1; Heterozygous = −1
G20210A prothrombin gene mutation	Negative = 1; Heterozygous = −1
Antiphospholipid syndrome	Negative = 1; Positive = −1
Smoking, hormonal therapy, arterial hypertension, diabetes mellitus, dyslipidemia, cancer, residual venous thrombus on US Doppler	Yes = 1; No = −1

Abbreviations: FV, factor V; US, ultrasound.