ABSTRACT
Objective To explore the long-term effects of maternal pregnancy bisphenol A (BPA) exposure on emotional and behavioral problems appeared in their preschool children.Methods The study sample was a subset of the China-Anhui Birth Cohort Study (C-ABCS).A unified questionnaire was used to collect basic information on both pregnant women and their children.Free BPA concentration in maternal serum was determined by high-performance liquid chromatographytandem mass spectrometry (HPLC-MS/MS).The parent-report version of the Strengths and Difficulties Questionnaire (SDQ) was used to estimate the emotional and behavioral problems in preschool children.A total of 1 713 pairs of mothers and children were included in this study.Association between BPA exposure during pregnancy and the emotional and behavioral problems in preschool children was evaluated with multinomial logistic regression model.Results Prevalence rates in 1 713 preschool children appeared as:6.48％ of emotional problems,8.11％ for conduct problems,8.35％ for hyperactivity/ inattention,2.86％ for peer problems,11.38％ for prosocial behaviors and 7.94％ for total difficulties.Subjects were divided according to the degrees of exposure and the results showed as:low exposure group (≤0.120 ng/ml),medium exposure group (0.120＜BPA＜0.400 ng/ ml) and high exposure group (≥0.400 ng/ml) according to the serum BPA concentration in tertile.Results from the multivariate logistic regression analysis showed that high level of maternal BPA exposure appeared a risk factor on children's abnormal conducts (OR=1.876,95％CI:1.161-3.029),more obvious in boys (OR=2.291,95％CI:1.126-4.661).Conclusion Maternal exposure to high level of BPA during pregnancy might increase the detrimental effects of abnormal conducts in their preschool children,more obviously seen in boys.
ABSTRACT
Objective@#To analyze the association between maternal bisphenol A exposure during early pregnancy and sleep problems among preschool children.@*Methods@#Research subjects were from one of the sub-cohorts(Ma'anshan Cohort) of the China-Anhui Birth Cohort Study (C-ABCS) in Ma'anshan city. The basic situation of pregnant women and sleep information of preschool children were investigated. We selected preschool children whose mother's maternal serum bisphenol A concentrations of the first trimester had been already detected between December 2012 to Januray 2014. 1 259 pairs of mothers and children were included. The concentrations of bisphenol A exposure during early pregnancy were divided into low, medium and high exposure groups according to 25th percentile (P25) and 75th percentile (P75) levels. Multivariate multinomial logistic regression model was used to analyze the association between maternal bisphenol A exposure during early pregnancy and sleep-related problems in preschool children.@*Results@#The P50 (P25-P75) of serum bisphenol A exposure level during early pregnancy was 0.231 (0.106-0.512) ng/ml. The sleep-related problems scores of 1 259 preschool children were (16.43±3.82) points. The occasional sleep-related problems were detected about 47.8% (602 cases) and frequent sleep-related problems were detected about 18.3% (230 cases). After the adjustment of the confounding factors such as children's gender, age, BMI, sleep position (lying down, sleeping on one's back), the length of time to sleep and the length of sleep at night, in comparison with bisphenol A low exposure group, the OR (95%CI) value of preschool children with occasional sleep-related problems in maternal bisphenol A high exposure group during early pregnancy was 1.44 (1.01-2.06). After the gender stratification, the results showed that in comparison with bisphenol A low exposure group, the OR (95%CI) value of preschool girls with occasional sleep-related problems in maternal bisphenol A medium and high exposure group during early pregnancy were 1.61 (1.05-2.46) and 2.40 (1.42-4.04), respectively. The OR (95%CI) value of preschool girls with frequent sleep-related problems in maternal bisphenol A high exposure group during early pregnancy was 2.64 (1.34-5.17). However, in boys, there was no statistically significant association between maternal bisphenol A exposure during early pregnancy and sleep-related problems (P>0.05).@*Conclusion@#Maternal bisphenol A exposure during early pregnancy might be related to sleep-related problems in preschool children.
ABSTRACT
Objective To explore the long-term effects of maternal pregnancy bisphenol A (BPA) exposure on emotional and behavioral problems appeared in their preschool children.Methods The study sample was a subset of the China-Anhui Birth Cohort Study (C-ABCS).A unified questionnaire was used to collect basic information on both pregnant women and their children.Free BPA concentration in maternal serum was determined by high-performance liquid chromatographytandem mass spectrometry (HPLC-MS/MS).The parent-report version of the Strengths and Difficulties Questionnaire (SDQ) was used to estimate the emotional and behavioral problems in preschool children.A total of 1 713 pairs of mothers and children were included in this study.Association between BPA exposure during pregnancy and the emotional and behavioral problems in preschool children was evaluated with multinomial logistic regression model.Results Prevalence rates in 1 713 preschool children appeared as:6.48％ of emotional problems,8.11％ for conduct problems,8.35％ for hyperactivity/ inattention,2.86％ for peer problems,11.38％ for prosocial behaviors and 7.94％ for total difficulties.Subjects were divided according to the degrees of exposure and the results showed as:low exposure group (≤0.120 ng/ml),medium exposure group (0.120＜BPA＜0.400 ng/ ml) and high exposure group (≥0.400 ng/ml) according to the serum BPA concentration in tertile.Results from the multivariate logistic regression analysis showed that high level of maternal BPA exposure appeared a risk factor on children's abnormal conducts (OR=1.876,95％CI:1.161-3.029),more obvious in boys (OR=2.291,95％CI:1.126-4.661).Conclusion Maternal exposure to high level of BPA during pregnancy might increase the detrimental effects of abnormal conducts in their preschool children,more obviously seen in boys.