Table 1.

Baseline data (PP).

Variable	Magnesium (n = 83)	Placebo (n = 93)	p value
Maternal age	27.0 (3.4)	26.9 (3.5)	0.92
	27.0 (20.0; 36.0)	27.0 (18.0; 36.0)
	n = 83	n = 93
BMI (body mass index)	24.7 (4.7)	24.1 (3.8)	0.62
	24.0 (18.0; 43.0)	24.0 (18.0; 35.0)
	n = 83	n = 93
Smoking habit	14 (16.9%)	17 (18.3%)	0.96
DBP at week 12	67.5 (7.9)	67.0 (6.1)	0.61
	70.0 (50.0; 85.0)	70.0 (55.0; 85.0)
	n = 83	n = 93
SBP at week 12	114.6 (10.8)	112.7 (10.1)	0.19
	115.0 (90.0; 135.0)	110.0 (90.0; 135.0)
	n = 83	n = 93
Gestational length at inclusion	12.7 (1.5)	12.8 (1.7)	0.94
	12.6 (9.4; 16.9)	12.6 (8.9; 17.7)
	n = 83	n = 93
Extra Mg (mg/day in multivitamin tablets)	31.7 (47.5)	33.9 (48.3)	0.70
	0.0 (0.0; 150.0)	0.0 (0.0; 150.0)
	n = 81	n = 92
Mg intake (n)
0 (no)	53 (65.4%)	58 (63.0%)
1 (yes)	28 (34.6%)	34 (37.0%)	0.87

For categorical variables, n (%) is presented.

For continuous variables, mean (SD)/median (min; max)/n is presented.

For comparison between groups, Fisher's exact test (lowest 1-sided p value multiplied by 2) was used for dichotomous variables and the Mann–Whitney U test was used for continuous variables.