. Author manuscript; available in PMC: 2015 Feb 1.

Published in final edited form as: Am J Obstet Gynecol. 2013 Oct 7;210(2):128.e1–128.e6. doi: 10.1016/j.ajog.2013.10.008

Table 1.

Demographic Characteristics of Population

	Omega-3	Placebo	p value
Cases	162	153
BMI, mean (SD)	26.0 (6.1)	26.1 (6.9)	0.81
Race, N(%)			0.89
African American	43 (26.5%)	44 (28.8%)
Hispanic	24 (14.8%)	21 (13.7%)
Caucasian	95 (58.6%)	88 (57.5%)
GA (weeks) @ sample time, mean (SD)	27.0 (1.4)	26.9 (1.5)	0.25
GA (weeks) @ delivery, mean (SD)	37.4 (2.3)	37.0 (3.0)	0.76
Progesterone (ng/ml), mean (SD)	72.4 (26.9)	70.5 (22.1)	0.63
17-OHPC (ng/ml), mean (SD)	11.3 (5.8)	10.7 (4.0)	0.79
# of injections at time of blood sample, median (interquartile range)	9 (7-10)	9 (7-10)	0.26
Delivery < 37 0/7 weeks	53 (32.7%)	53 (34.6%)	0.72