American journal of obstetrics and gynecology · 2010
Clinical and biochemical predictors of very preterm birth in twin-to-twin transfusion syndrome treated by fetoscopy.
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Cobo Teresa, Palacio Montse, Eixarch Elisenda, Crispi Fátima, Mercadé Inma, Martínez-Crespo Josep M, Gratacós Eduard
Аннотация
OBJECTIVE: To evaluate pre- and postoperative predictors of preterm birth in twin-to-twin transfusion syndrome treated with fetoscopic placental laser coagulation.
STUDY DESIGN: Prospective cohort study (n = 166) assessing cervical length (pre and postoperatively), amniotic fluid interleukin-6, serum C-reactive protein and duration of surgery. Logistic regression was used to investigate associations with preterm delivery.
RESULTS: Preterm delivery within 7 days, before 28.0 and 32.0 weeks occurred in 4.8%, 16.8%, and 28.9%, respectively. The only significant predictor of delivery within 7 days was postoperative cervical length (odds ratio [OR], 0.5; 95% confidence interval [CI], 0.3-0.9). Concerning delivery before 32.0 weeks, preoperative cervical length (OR, 0.9; 95% CI, 0.8-1.0), and gestational age (OR, 0.8; 95% CI, 0.4-0.9) were independent risk factors but the association was weak. The presence of a single survivor after surgery was associated with a clear reduction of risk (OR, 0.3; 95% CI, 0.1-0.6). Inflammatory biomarkers and duration of surgery did not discriminate risk of prematurity.
CONCLUSION: No strong preoperative predictive factor of preterm birth could be identified. A single survivor was a strong protective factor of very preterm birth.
STUDY DESIGN: Prospective cohort study (n = 166) assessing cervical length (pre and postoperatively), amniotic fluid interleukin-6, serum C-reactive protein and duration of surgery. Logistic regression was used to investigate associations with preterm delivery.
RESULTS: Preterm delivery within 7 days, before 28.0 and 32.0 weeks occurred in 4.8%, 16.8%, and 28.9%, respectively. The only significant predictor of delivery within 7 days was postoperative cervical length (odds ratio [OR], 0.5; 95% confidence interval [CI], 0.3-0.9). Concerning delivery before 32.0 weeks, preoperative cervical length (OR, 0.9; 95% CI, 0.8-1.0), and gestational age (OR, 0.8; 95% CI, 0.4-0.9) were independent risk factors but the association was weak. The presence of a single survivor after surgery was associated with a clear reduction of risk (OR, 0.3; 95% CI, 0.1-0.6). Inflammatory biomarkers and duration of surgery did not discriminate risk of prematurity.
CONCLUSION: No strong preoperative predictive factor of preterm birth could be identified. A single survivor was a strong protective factor of very preterm birth.