We have located links that may give you full text access.
Post-term birth: risk factors and outcomes in a 10-year cohort of Norwegian births.
Obstetrics and Gynecology 1997 April
OBJECTIVE: To identify factors associated with post-term birth and factors associated with adverse outcomes in post-term births.
METHODS: The sample was a 10-year cohort (1978-1987) of term (n = 379,445) and post-term (n = 65,796) births from the Medical Birth Registry of Norway. Gestational age was based on mothers' recall of the last menstrual period. Multivariate analyses included proportional hazards regression and binomial logistic regression.
RESULTS: After controlling for covariates, there was only a slightly increased risk of perinatal mortality in post-term as compared with term births (adjusted relative risk [RR] 1.11; 95% confidence interval [CI] 0.97, 1.27). For post-term births, risk factors for perinatal mortality were small size for gestational age (SGA) (adjusted RR 5.68; 95% CI 4.37, 7.38) and maternal age 35 years or older (adjusted RR 1.88; 95% CI 1.22, 2.89), whereas large size for gestational age (LGA) was a protective factor (adjusted RR 0.51; 95% CI 0.26, 1.00). Similar risk factor RRs were found for perinatal mortality in term births. Fetal distress was associated with both SGA and post-term birth; labor dysfunction and obstetric trauma were associated with both LGA and post-term birth; shoulder dystocia and maternal hemorrhage were associated with LGA only.
CONCLUSIONS: Among post-term births, maternal complications were generally associated with larger fetal size, and fetal complications were associated with smaller fetal size. The evidence for an adverse impact on perinatal mortality of post-term birth is weak once other factors are taken into account.
METHODS: The sample was a 10-year cohort (1978-1987) of term (n = 379,445) and post-term (n = 65,796) births from the Medical Birth Registry of Norway. Gestational age was based on mothers' recall of the last menstrual period. Multivariate analyses included proportional hazards regression and binomial logistic regression.
RESULTS: After controlling for covariates, there was only a slightly increased risk of perinatal mortality in post-term as compared with term births (adjusted relative risk [RR] 1.11; 95% confidence interval [CI] 0.97, 1.27). For post-term births, risk factors for perinatal mortality were small size for gestational age (SGA) (adjusted RR 5.68; 95% CI 4.37, 7.38) and maternal age 35 years or older (adjusted RR 1.88; 95% CI 1.22, 2.89), whereas large size for gestational age (LGA) was a protective factor (adjusted RR 0.51; 95% CI 0.26, 1.00). Similar risk factor RRs were found for perinatal mortality in term births. Fetal distress was associated with both SGA and post-term birth; labor dysfunction and obstetric trauma were associated with both LGA and post-term birth; shoulder dystocia and maternal hemorrhage were associated with LGA only.
CONCLUSIONS: Among post-term births, maternal complications were generally associated with larger fetal size, and fetal complications were associated with smaller fetal size. The evidence for an adverse impact on perinatal mortality of post-term birth is weak once other factors are taken into account.
Full text links
Related Resources
Trending Papers
Challenges in Septic Shock: From New Hemodynamics to Blood Purification Therapies.Journal of Personalized Medicine 2024 Februrary 4
Molecular Targets of Novel Therapeutics for Diabetic Kidney Disease: A New Era of Nephroprotection.International Journal of Molecular Sciences 2024 April 4
The 'Ten Commandments' for the 2023 European Society of Cardiology guidelines for the management of endocarditis.European Heart Journal 2024 April 18
A Guide to the Use of Vasopressors and Inotropes for Patients in Shock.Journal of Intensive Care Medicine 2024 April 14
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app