TY - BOOK AU - Driggers, Rita W AU - Singh, Jasbir AU - Timofeev, Julia TI - Spontaneous preterm birth in African-American and Caucasian women receiving 17alpha-hydroxyprogesterone caproate SN - 0735-1631 PY - 2014/// KW - *African Americans/sn [Statistics & Numerical Data] KW - *Estradiol Antagonists/tu [Therapeutic Use] KW - *European Continental Ancestry Group/sn [Statistics & Numerical Data] KW - *Hydroxyprogesterones/tu [Therapeutic Use] KW - *Premature Birth/eh [Ethnology] KW - *Premature Birth/pc [Prevention & Control] KW - Adolescent KW - Adult KW - Cervical Length Measurement KW - Cervix Uteri/ah [Anatomy & Histology] KW - Female KW - Gestational Age KW - Humans KW - Pregnancy KW - Pregnancy, High-Risk KW - Recurrence/pc [Prevention & Control] KW - Retrospective Studies KW - Young Adult KW - MedStar Washington Hospital Center KW - Obstetrics and Gynecology/Maternal-Fetal Medicine KW - Journal Article N2 - CONCLUSION: Despite treatment with 17P, African-American women have higher rates of recurrent preterm birth. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA; OBJECTIVE: To determine if the rates of recurrent spontaneous preterm birth in women receiving 17alpha-hydroxyprogesterone caproate (17P) differ according to maternal race; RESULTS: African-American women initiated 17P injections later (19.6 versus 18.9 weeks, p<0.001) and discontinued injections earlier (33.2 versus 34.1 weeks, p<0.001) than Caucasian women. Spontaneous recurrent preterm birth<34 weeks was higher in African-Americans versus Caucasians receiving 17P (odds ratio 2.1; 95% confidence interval 1.7, 2.4). After adjusting for other significant factors, African-American race retained the strongest association with recurrent spontaneous preterm birth<34 weeks. Within each racial group, short cervical length<25mm before 27 weeks' gestation had the highest hazard of recurrent spontaneous preterm delivery; STUDY DESIGN: Retrospective analysis of a cohort of women enrolled in outpatient 17P administration at<27 weeks. Maternal characteristics, obstetric history, and rates of recurrent preterm birth were determined using chi-square and multivariable Cox proportional hazards regression at two-tailed alpha=0.05. Primary study outcome was defined as having a spontaneous preterm birth<34 weeks UR - http://dx.doi.org/10.1055/s-0033-1334452 ER -