Table 1.

Characteristics of the enrolled women (n = 70)

Variable	Study Group n=56	Control Group n=14	P value
Demographic characteristics
Age, years*	27.5 [6.3]	25.1 [6.4]	0.204
Parity †	1 [0 – 1]	2 [1 – 2]	0.011
Gravidity †	2 [1 – 3]	3 [1 – 4]	0.428
Race §   Caucasian   African-American   Hispanic   Other	25 (45) 15 (27) 9 (16) 7 (12)	2 (14) 1 (7) 8 (57) 3 (21)	0.005
Gestational age enrollment, weeks †	28.1 [25.3 – 30.6]	30.2 [28.0 – 31.5]	0.094
PPROM §	27 (48)	0 (0)	<0.001
Outcome characteristics
Ultrasound-to-delivery interval, days †	4 [1 – 23]	62 [53 – 82]	<0.001
Gestational age delivery, weeks †	30.6 [27.4 – 33.3]	39.4 [38.2 – 40.2]	<0.001
Birthweight, grams †	1,670 [973 – 2,133]	3,245 [3,060 – 3,580]	<0.001
Cesarean delivery §	20 (36)	4 (29)	0.758
Preterm delivery <34 weeks ‡	44 (79)	0 (0)	<0.001
Preterm delivery <37 weeks ‡	49 (88)	0 (0)	<0.001

^*Data presented as mean and standard deviation [SD] and analyzed with Student t-test

^†Data presented as median [interquartile range] and analyzed with Mann-Whitney test

^§Data presented as n (%) and analyzed by Chi square test

^‡Data presented as n (%) and analyzed by Fisher’s exact test