Table 1: Demographic and clinical characteristics of the study population
Data are n (%) or mean ±SD. Abbreviations: CGA (cervical gland area), TVUS (transvaginal ultrasound), PTB (preterm birth), GA (gestational age), CL (cervical length).
Mixed and Unknown Race categories not shown.
b Prenatal Genitourinary Infection includes sexually transmitted infections, bacterial vaginosis, urinary tract infections, and chorioamnionitis. Prior Uterine Surgeries includes dilation and curettage/evacuation, myomectomy, cesarean, and hysteroscopy. Prior Cervical Excision includes loop electrocautery procedure and cold knife cone. Progesterone Supplementation includes vaginal and/or intramuscular routes. Short Cervix is defined as CL <2.5 cm.