Related Experiment Videos
Perinatal mortality in term and post-term births
E Fabre1, R González de Agüero, J L de Agustín
1Department of Obstetrics and Gynecology, University Hospital, Faculty of Medicine, University of Zaragoza, Spain.
Our aim was to compare the fetal mortality rate (FMR), early neonatal mortality rate (ENMR) and perinatal mortality rate (PMR) of post-term and term births, 2) to examine trends in the incidence and perinatal mortality rates of post-term and term births. We used data from Spanish Perinatal Mortality Survey of 1980, 1986, 1989 and 1992. The data include 40,863 post-term births (42 weeks and over) and 517,060 term births (37-41 weeks). Perinatal mortality rates of post-term and term births were compared. The incidence of post-term births was 7.3%. The relative risk (RR) of FMR for post-term compared to term births was 1.1 (95% confidence interval [CI] 0.9-1.3), of ENMR was 1.6 (95% CI 1.4-2.0) and of PMR was 1.3 (95% CI 1.1-1.5). From 1980 to 1992 there was a significant reduction in the incidence of post-term births (8.1% vs 5.0%), in the FMR (4.5/1000 vs 1.9/1000), ENMR (4.3/1000 vs 2.0/1000) and PMR (8.7/1000 vs 3.9/1000) of post-term births. There was no significant difference in the FMR between post-term and term in each year studied. Post-term births had a significantly higher ENMR and PMR than term births in 1980, and they were equivalent from 1983 to 1992. The incidence of post-term births, its FMR, ENMR and PMR have been significantly reduced during the whole period studied.
Our aim was to compare the fetal mortality rate (FMR), early neonatal mortality rate (ENMR) and perinatal mortality rate (PMR) of post-term and term births, 2) to examine trends in the incidence and perinatal mortality rates of post-term and term births. We used data from Spanish Perinatal Mortality Survey of 1980, 1986, 1989 and 1992. The data include 40,863 post-term births (42 weeks and over) and 517,060 term births (37-41 weeks). Perinatal mortality rates of post-term and term births were compared. The incidence of post-term births was 7.3%. The relative risk (RR) of FMR for post-term compared to term births was 1.1 (95% confidence interval [CI] 0.9-1.3), of ENMR was 1.6 (95% CI 1.4-2.0) and of PMR was 1.3 (95% CI 1.1-1.5). From 1980 to 1992 there was a significant reduction in the incidence of post-term births (8.1% vs 5.0%), in the FMR (4.5/1000 vs 1.9/1000), ENMR (4.3/1000 vs 2.0/1000) and PMR (8.7/1000 vs 3.9/1000) of post-term births. There was no significant difference in the FMR between post-term and term in each year studied. Post-term births had a significantly higher ENMR and PMR than term births in 1980, and they were equivalent from 1983 to 1992. The incidence of post-term births, its FMR, ENMR and PMR have been significantly reduced during the whole period studied.