OBJECTIVE: The aim of this study was to examine the relation between cervical length and the presence of funneling and the risk of preterm delivery. METHOD: This prospective blind cohort involved 200 hospitalized women with preterm labor in a tertiary care hospital. Women were recruited for a single transvaginal ultrasonography to assess cervical length and presence of funneling. The main outcome measures were: (1) relative risks (RR) and adjusted odds ratios of preterm delivery (<37 weeks' gestation); (2) time interval between the cervical ultrasonography date to 37 weeks' gestation or to-preterm birth. RESULTS: The RR of preterm delivery according to the cervical length (cut-off of <30 mm) was 2.79 (95% CI 1.70--4.59). The RR according to the presence of funneling (cut-off of >5 mm) was 1.39 (95% CI 0.99--1.95). The adjusted odds ratio was 3.92 (95% IC 1.75--8.75) for cervical length and 0.77 (95% CI 0.35--1.67) for funneling. Women with a cervical length of <30 mm had a significantly shorter interval from ultrasonography date up to 37 weeks' gestation than did women with a cervical length of >30 mm (P<0.003). CONCLUSION: Ultrasonographic mensuration of the cervix provides predictive information on the risk of preterm delivery.
OBJECTIVE: The aim of this study was to examine the relation between cervical length and the presence of funneling and the risk of preterm delivery. METHOD: This prospective blind cohort involved 200 hospitalized women with preterm labor in a tertiary care hospital. Women were recruited for a single transvaginal ultrasonography to assess cervical length and presence of funneling. The main outcome measures were: (1) relative risks (RR) and adjusted odds ratios of preterm delivery (<37 weeks' gestation); (2) time interval between the cervical ultrasonography date to 37 weeks' gestation or to-preterm birth. RESULTS: The RR of preterm delivery according to the cervical length (cut-off of <30 mm) was 2.79 (95% CI 1.70--4.59). The RR according to the presence of funneling (cut-off of >5 mm) was 1.39 (95% CI 0.99--1.95). The adjusted odds ratio was 3.92 (95% IC 1.75--8.75) for cervical length and 0.77 (95% CI 0.35--1.67) for funneling. Women with a cervical length of <30 mm had a significantly shorter interval from ultrasonography date up to 37 weeks' gestation than did women with a cervical length of >30 mm (P<0.003). CONCLUSION: Ultrasonographic mensuration of the cervix provides predictive information on the risk of preterm delivery.
Authors: Jolande Y Vis; Rosanna A Kuin; William A Grobman; Ben Willem J Mol; Patrick M M Bossuyt; Brent C Opmeer Journal: Arch Gynecol Obstet Date: 2011-04-12 Impact factor: 2.344