Table 1.

Baseline characteristics in both groups

Variable		Nif + SC	Nif	P-value
Mean maternal age*		29.5 $\pm$ 5.9	28.9 $\pm$ 5.6	0.61
Mean gestation age*		29.2 $\pm$ 2.9	28.3 $\pm$ 2.8	0.07
BMI (kg/m2)*		27.4 $\pm$ 4.7	27.2 $\pm$ 3.5	0.78
Parity**
	Nulliparous	13 (20.6)	12 (19.0)
	Multiparous	50 (79.4)	51 (80.9)	0.82
*Data presented as Mean $\pm$ SD. t test, **Data presented as n (%). Chi-square test. BMI: Body mass index, Nif: Nifedipine, SC: Sildenafil