. Author manuscript; available in PMC: 2018 Apr 12.

Published in final edited form as: Am J Obstet Gynecol. 2017 May 15;217(3):369.e1–369.e9. doi: 10.1016/j.ajog.2017.05.019

TABLE 2.

Baseline characteristics of study cohort

Characteristic
Treatment group, n (%)	137 (51.1)
Race, n (%)
African American	75 (28.0)
Caucasian	174 (64.9)
Other	19 (7.1)
Maternal age, mean (SD), y	28 (5.8)
Prepregnancy BMI, mean (SD), kg/m²	26.0 (6.5)
No. of previous SPTB, n (%)
1	196 (73.1)
2	63 (23.5)
3	6 (2.2)
4	3 (1.1)
Gestational age at delivery, mean (SD), wk	37.4 (2.5)
Current smoker, n (%)	29 (10.8)

BMI, body mass index; SPTB, spontaneous preterm birth.

Bustos et al. Association of CYP3A and PR SNPs and 17 OHP-C. Am J Obstet Gynecol 2017.