* Adjusted for railway and road traffic noise, age, sex, educational level and country of birth Comparison by road traffic and railway noise annoyance and exposure Annoyance due to road traffic noise was investigated in both studies (Table 1).
Because of the small number of cases of assisted vaginal delivery and breech birth, comparisons were only made between cesarean section and normal vaginal delivery.
We have clarified that the optimal GA was earlier and the optimal birth weight was lower in multiple births in comparison to singletons.
This proportion was 14.9% in the excluded group of 241 births (percentage comparison test, p = 0.7).The characteristics of the study population are given in Table 1.
Prophylactic use of misoprostol at home births in comparison to a placebo can reduce the risk of PPH by 24%to47%7% [ 8, 9].
The levels of complement C3 and antithrombin were decreased in the follicular fluid in a group of young women who had successful live births in comparison with those who underwent IVF procedures with no success.
Nevertheless, despite the model controlling for parity and many other known confounders, there remains a greatly elevated risk of PPH for women who have planned hospital births in comparison to those who plan a home birth (odds ratio, 2.5, 95% confidence interval, 1.7 to 3.8).
Another limitation is that the birth cohort comparison group includes about 1% of births of children who died postnatally in addition to an undetermined number who moved out of the study area between birth and the age of 8 years, whereas children who died postnatally and those moving out of the study area after birth are excluded from the case group.
However, women with placenta previa who had a late preterm birth, had an increased but not statistically significant rate of recurrent preterm birth in comparison to those who delivered at term (late preterm birth 12.8% (11/86), p =.09).
We calculated mean birth weight and percent of SGA, preterm birth and comparison group by quartiles of traffic and land use variables and median household income (table 2).
Among parous women the risk tended to increase with later age at last birth; in comparison with parous women reporting their last birth before age 25, the OR was 1.9 in those reporting their last birth at > or =35 years.
