Table 1. Clinical characteristics of patients.

	Controls (n = 19)	Non severe PE      (n = 6)	Severe PE (n = 13)	p
Maternal age (years)	28 [26-32]	36 [33-37]	30 [27-34]	0.17
Weight (kg)	70 [64-83]	77 [72-81]	78 [66-86]	0.60
Smoking	1 (5)	1 (17)	1 (8)	1
Previous PE	0	0	3 (23)	0.52
Caucasian race	9 (47)	4 (67)	9 (69)	1
Gestity / Parity	G2/P1 [1/0 - 3/2]	G3/P1 [2/0 - 4/2]		1
Gestational age at inclusion	36 [33-37]	34 [32-36]	34 [31-35]	0.79
Gestational age at birth	40 [39-40]**	36 [35-38]	34 [31-36]	0.12
Birth weight (g)	3240 [2990-3620]**	1805 [1495-1930]	1900 [1060-2120]	0.92
Blood pH at birth	7.32 [7.25-7.34]	7.29 [7.21-7.30]	7.33 [7.28-7.36]	0.12

The values were expressed as median and interquartile range (in brackets) or absolute count and percentages (in parentheses). The p values correspond to the comparison between non-severe and severe PE. The asterisks correspond to the comparison between controls and PE patients independently of the severity of the disease. *p < 0.01; **p < 0.001.