Cervical lenght as a predictor of preterm delivery: gestational agerelated percentiles vs fixed cut-offs

Cervical lenght as a predictor of preterm delivery: gestational agerelated percentiles vs fixed cut-offs

Authors

  • D. Gramellini
  • S. Fieni
  • C. Kaihura, et al.

Keywords:

Cervical length, ultrasound, preterm delivery

Abstract

Background: To determine whether preterm delivery is more effectively predicted by sonographic cervical length measurement using fixed cut-off or gestational age-specific percentiles. Methods: One hundred and eight patients hospitalized for suspected preterm labor (PTL) were studied prospectively between the 20th and the 33rd week of gestation. Results: Cervical length below 15 mm, 25 mm and the 2.5th centile showed substantially equivalent odds ratios for delivery within 7 days (7.5, 7.6, and 7.1, respectively), while for delivery before the 34th week the odds ratios varied between 3.6 with cervical length <2.5th centile and 6.2 with cervical length <25 mm. Moreover, the negative predictive value for delivery within 7 days exceeded 90% when cervical length was above 25 mm, the 10th and the 2.5th percentile, and 85% when above 15 mm. Conclusion: The comparison of fixed and gestational age-specific cut-offs demonstrates a better reliability of fixed cut-offs (15 or 25 mm) in predicting preterm delivery, both before 34 weeks and within 7 days of the ultrasound examination.

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Published

01-12-2007

Issue

Section

ORIGINAL ARTICLES

How to Cite

1.
Cervical lenght as a predictor of preterm delivery: gestational agerelated percentiles vs fixed cut-offs. Acta Biomed [Internet]. 2007 Dec. 1 [cited 2024 Jun. 16];78(3):220-4. Available from: https://www.mattioli1885journals.com/index.php/actabiomedica/article/view/1906