Multidimensional screening for a multifunctional cervix: Examining
cervical gland area at cervical length screening to predict spontaneous
preterm birth.
Abstract
OBJECTIVE: To sonographically characterize the cervical gland
area (CGA) and determine if its evaluation at the time of cervical
length (CL) screening can be useful for preterm birth (PTB) prediction.
DESIGN: Pilot retrospective cohort study. SETTING:
Academic medical center (NYU Langone Health Tisch Hospital).
POPULATION: Singleton gestations with universal CL screening
performed between 18 0/7 – 23 6/7
weeks with subsequent live neonate delivery. METHODS:
Transvaginal ultrasound (TVUS) cervical images and clinical data were
reviewed, comparing sonographically present and absent CGA groups.
MAIN OUTCOME MEASURES: Spontaneous PTB <37 weeks and
quantitative CGA measurements. RESULTS: The cohort of 772
patients demonstrated similar characteristics when stratified by absent
and present CGA. Rates of PTB and absent CGA were 2.6% and 2.3%,
respectively. Absent CGA was significantly associated with delivery
<37, <34, and <32 weeks
(p<0.001), but gland measurements did not correlate with
gestational age at delivery. There was good agreement between reviewers
for qualitative CGA (PABAK 0.89). Multiple logistic regression modeling
demonstrated better performance of CL screening for PTB prediction with
the addition of qualitative CGA evaluation (p<0.001).
CONCLUSIONS: Qualitative evaluation of the CGA on mid-gestation
TVUS may improve CL screening for PTB. Given the biologic activity of
the cervical glands, optimal screening in populations with various risk
profiles may warrant a multimodal approach that evaluates the mechanical
and biological functions of the cervix.