Table 3.

Labour and fetal outcomes. Missing results are due to labour at other hospitals and no access to medical records (PP).

Variable	Magnesium (n = 83)	Placebo (n = 93)	p value
Gestational length at birth	40.2 (2.0)	39.9 (1.5)	0.03
	40.7 (29.3; 42.4)	40.1 (35.0; 42.4)
	n = 80	n = 89
Premature labour (<37+0 weeks)	5 (6.3%)	3 (3.4%)	0.60
Duration of labour (active labour in hours)	7.27 (3.81)	7.07 (3.60)	0.85
	7.00 (1.00; 18.00)	7.00 (1.00; 17.00)
	n = 63	n = 74
Mode of delivery
Emergency Cesarean Section	14 (17.9%)	7 (8.1%)	0.10
Elective Cesarean Section	1 (1.3%)	5 (5.8%)	0.26
Normal vaginal delivery	59 (75.6%)	62 (72.1%)	0.76
Vacuum extraction	4 (5.1%)	12 (14.0%)	0.10
Blood loss, mL	499.7 (351.5)	518 (347)	0.48
	400.0 (50.0; 2200.0)	425 (150; 2000)
	n = 78	n = 86
Birth weight (g)	3482 (597)	3511 (454)	0.99
	3570 (1335; 4594)	3575 (2540; 4860)
	n = 79	n = 86
Apgar score at 5 minutes	9.73 (0.80)	9.73 (0.64)	0.72
	10.00 (5.00; 10.00)	10.00 (7.00; 10.00)
	n = 78	n = 86
Umbilical arterial pH	7.25 (0.08)	7.25 (0.09)	0.92
	7.27 (7.08; 7.45)	7.26 (7.03; 7.43)
	n = 72	n = 80
NICU care
0 (no)	62 (80.5%)	76 (88.4%)
1 (yes)	15 (19.5%)	10 (11.6%)	0.24

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 Chi-square test was used for nonordered categorical variables and the Mann–Whitney U test was used for continuous variables.