Table 1.

Characteristics of seronegative and seropositive APS women

	Seronegative APS (n=187)	Seropositive APS (n=285)
General characteristics
Caucasian (n; %)	150 (82)	188 (66)
Age (years)	33±5	36±5†
Obesity (n; %)	15 (9)	32 (11)
Arterial hypertension (n; %)	3 (2)	54 (19)†
Diabetes mellitus (n; %)	1 (1)	18 (6)†
Tobacco use (n; %)	12 (7)	33 (12)†
Hypercholesterolaemia (n; %)	0	69 (24)†
Protein S deficiency/V Leiden (n; %)	0/1 (1)	8 (3)/10 (4)†
APS features
Thrombotic APS
Arterial APS (n; %)	0	105 (37)†
Venous APS (n; %)	9 (6)	154 (54)†
Obstetrical APS (n; %)	168 (89)	89 (31)†
Mix APS (n; %)	8 (4)	16 (6)
Non-criteria features (n; %)	16 (9)	141 (49)†
Obstetrical history
Miscarriages (n; %)	66 (35)	18 (6)†
Intrauterine deaths (n; %)	60 (32)	46 (16)†
Prematurity <34 weeks of gestation (n; %)	43 (23)	31 (11)†

†p<0.05.

Values are numbers with frequencies and means with SD.

APS, antiphospholipid syndrome.