Background To examine whether maternal alcohol intake, including binge drinking (intake ≥5 drinks, equivalent to 60 g pure ethanol on a single occasion), is associated with autistic spectrum ...disorders (ASD) and infantile autism. Methods Participants were 80 552 children and their mothers enrolled in the Danish National Birth Cohort from 1996 to 2002. Alcohol consumption was obtained by self-report during pregnancy. Information on ASD was obtained from the Danish Central Psychiatry Register. Follow-up ended on February 2008. Data were analysed by means of Cox regression. Results In total, 401 children were diagnosed with ASD and 157 with infantile autism. No association was found between average alcohol consumption and ASD or infantile autism, respectively. For binge drinking, the adjusted hazard ratio (HR) for ASD was 0.72 95% confidence interval (CI): 0.53–0.97 among women who binge drank once during pregnancy compared with women who did not binge drink. The corresponding HR for infantile autism was 0.61 (95% CI: 0.36–1.02). However, the HR for ASD was 0.84 (95% CI: 0.51–1.36) when restricting the analysis to first-time pregnancies conceived within 6 months of trying. No estimate was made for infantile autism due to low number of cases. No association was seen for more than one binge episode and for the timing of binge drinking. Conclusion Our findings do not support that a low prenatal alcohol exposure increases the risk of ASD or infantile autism. The lower risk for women who binge drank once during pregnancy is most likely non-causal.
Cryptorchidism is the most frequent congenital malformation in boys and is associated with low sperm count, infertility and testicular cancer. Unhealthy maternal lifestyle during pregnancy such as ...smoking, high prepregnancy body mass index (BMI) as well as alcohol and caffeine intake may constitute possible risk factors for cryptorchidism, but results from the few previous studies are conflicting. We aimed to explore the association between maternal lifestyle factors and occurrence of cryptorchidism in sons.
The Danish National Birth Cohort and the Aarhus Birth Cohort provided information on maternal lifestyle from early pregnancy. Data were linked to several Danish health registers, multiple imputation was used to handle missing data and Cox proportional hazards models were used to adjust for potential confounders.
In total, 85,923 boys were included, and of them, 2.2% were diagnosed with cryptorchidism. We observed the strongest associations between maternal tobacco smoking and prepregnancy BMI and cryptorchidism. Sons of women who smoked 10-14 cigarettes/day had the highest hazard ratio (HR) for cryptorchidism (1.37; 95% CI: 1.06-1.76), and for maternal BMI ≥30 kg/m
, the HR was 1.32 (95% CI: 1.06-1.65). Binge drinking was associated with an HR <1, if the women had one or two episodes in pregnancy (HR: 0.81; 95% CI: 0.67-0.98). Average maternal alcohol intake and caffeine intake during pregnancy were not significantly associated with a higher occurrence of cryptorchidism detected at birth or later in life.
Maternal tobacco smoking, overweight and obesity in pregnancy were associated with higher occurrence of cryptorchidism in boys in this study.
Binge drinking in pregnancy and risk of fetal death Strandberg-Larsen, Katrine; Nielsen, Naja Rod; Grønbaek, Morten ...
Obstetrics and gynecology (New York. 1953),
03/2008, Letnik:
111, Številka:
3
Journal Article
Recenzirano
To examine whether the frequency and timing of binge drinking episodes (intake of five or more drinks on one occasion) during the first 16 weeks of pregnancy increase the risk of fetal death.
The ...study is based upon data from 89,201 women who were enrolled in the Danish National Birth Cohort from 1996 to 2002 and participated in an interview that took place in midpregnancy (n=86,752) or after a fetal loss (n=2,449). In total, 3,714 pregnancies resulted in fetal death. Data were analyzed by means of Cox regression models.
Neither the frequency nor the timing of binge episodes was related to the risk of early (at or before 12 completed weeks) or late (13-21 completed weeks) spontaneous abortion. However, three or more binge episodes showed an adjusted hazard ratio of 1.56 (95% confidence interval 1.01-2.40) for stillbirth (22 or more completed weeks) relative to nonbinge drinkers. Women with an average intake of three or more drinks per week and two or more binge drinking episodes had a hazard ratio of 2.20 (95% confidence interval 1.73-2.80) compared with women with no average intake and no binge drinking.
Binge drinking three or more times during pregnancy is associated with an increased risk of stillbirth, but neither frequency nor timing of binge drinking was associated with an increased risk of spontaneous abortion in clinically recognized pregnancies.
Synthetic oxytocin for labor augmentation during birth has been linked to negative neurodevelopment effects in children. We examined whether maternal labor augmentation was associated with lower ...cognitive ability in young adulthoods.
We identified 330,107 individuals (96.6% were men), with noninduced labor and with a cognitive ability test score, the Børge Priens Prøve (BPP) score, from draft board examinations in 1995-2015 (mean age, 18.8 years). Information on maternal labor augmentation was ascertained from the Danish Medical Birth Register, and we calculated mean differences in the BPP score according to maternal labor augmentation. We repeated our analyses in a sub-sample of siblings to control for unmeasured familial confounding.
Maternal labor augmentation was not associated with any noticeable decline in cognitive ability. However, the difference in the mean BPP score for exposure to maternal labor augmentation varied according to maternal parity, as the mean difference in BPP scores increased with increasing parity, in nulliparous: mean difference=-0.14 (95% CI=-0.23 to -0.04); in maternal parity 4+: mean difference=-1.21 (95% CI=-2.905 to -0.37). The sibling analysis showed little influence of shared familial factors on the association.
The mean BPP was slightly lower among labor augmented compared to nonaugmented and with an increasing difference with increasing parity. However, the differences were small and could not be considered of any clinical relevance. Furthermore, the sibling analyses suggested little confounding by familial factors.
Background Consumption of high doses of alcohol on a single occasion (binge drinking) may harm the developing foetus and pregnant women are advised to avoid binge drinking while pregnant. We present ...characteristics of Danish women who binge drank in the pre-and post recognised part of their pregnancy. Methods During the years 1996-2002 approximately 100,000 pregnant women were enrolled into the Danish National Birth Cohort. Women with information on binge drinking, time of recognition of pregnancy, age, reproductive history, marital status, smoking, occupational status, pre-pregnancy BMI, alcohol consumption before pregnancy, and mental disorders (n = 85,334) were included in the analyses. Results Approximately one quarter of the women reported binge drinking at least once during pregnancy; most of these in the pre-recognised part of pregnancy. Weekly alcohol consumption before pregnancy, single status and smoking were predictors for binge drinking in both the unrecognised and recognised part of pregnancy. Moreover, binge drinking in the pre-recognised part of pregnancy was more common among women aged 25-29 years, who were nulliparous, well educated in good jobs or skilled workers. Binge drinking after recognition of pregnancy was more common among women who were unintended pregnant, multiparous unskilled workers, had been unemployed for more than one year, or had mental/neurotic disorder. Conclusions In order to prevent binge drinking during pregnancy, health care providers should target their efforts towards pregnant women as well as pregnancy-planners. It is important to be aware that women who binge drink before versus after the pregnancy is recognised have different social characteristics.
AbstractOnly a few smaller studies have addressed the effect of psychosocial factors on risk of chronic obstructive pulmonary disease (COPD) in spite of the potential for psychosocial stress to ...affect development of the disease through immunological and behavioural pathways. The aim of this study is to determine the relation between various psychosocial risk factors, individually and accumulated, and COPD hospitalisation and deaths. A total of 8728 women and men free of asthma and COPD participating in the Copenhagen City Heart Study, were asked comprehensive questions on major life events, work-related stress, social network, vital exhaustion, economic hardship, and sleep medication in 1991-1993 and followed in nationwide registers until 2009, with <2% loss to follow-up. During follow-up, 461 women and 352 men were hospitalized with or died from COPD. Major life events in adult life and vital exhaustion were both associated with a higher risk of COPD in an exposure-dependent manner, with high vital exhaustion being associated with a hazard ratio HR of 2.31 (95% CI 1.69-3.16) for women and 2.48 (1.69-3.64) for men. A higher risk of COPD was also found in participants who experienced economic hardship or had a dysfunctional social network. Furthermore, the accumulation of psychosocial risk factors was associated with a higher risk of COPD in both women (HR = 2.40, 1.78-3.22) and men (HR = 1.93, 1.33-2.80). Psychosocial vulnerability may be important to consider both in clinical practice and when planning future preventive strategies against COPD.
The Horizon2020 LifeCycle Project is a cross-cohort collaboration which brings together data from multiple birth cohorts from across Europe and Australia to facilitate studies on the influence of ...early-life exposures on later health outcomes. A major product of this collaboration has been the establishment of a FAIR (findable, accessible, interoperable and reusable) data resource known as the EU Child Cohort Network. Here we focus on the EU Child Cohort Network’s core variables. These are a set of basic variables, derivable by the majority of participating cohorts and frequently used as covariates or exposures in lifecourse research. First, we describe the process by which the list of core variables was established. Second, we explain the protocol according to which these variables were harmonised in order to make them interoperable. Third, we describe the catalogue developed to ensure that the network’s data are findable and reusable. Finally, we describe the core data, including the proportion of variables harmonised by each cohort and the number of children for whom harmonised core data are available. EU Child Cohort Network data will be analysed using a federated analysis platform, removing the need to physically transfer data and thus making the data more accessible to researchers. The network will add value to participating cohorts by increasing statistical power and exposure heterogeneity, as well as facilitating cross-cohort comparisons, cross-validation and replication. Our aim is to motivate other cohorts to join the network and encourage the use of the EU Child Cohort Network by the wider research community.
PurposeThe purpose of MOthers and BAbies in Norway and Denmark cerebral palsy (MOBAND-CP) was to study CP aetiology in a prospective design.ParticipantsMOBAND-CP is a cohort of more than 210 000 ...children, created as a collaboration between the world's two largest pregnancy cohorts—the Norwegian Mother and Child Cohort study (MoBa) and the Danish National Birth Cohort. MOBAND-CP includes maternal interview/questionnaire data collected during pregnancy and follow-up, plus linked information from national health registries.Findings to dateInitial harmonisation of data from the 2 cohorts has created 140 variables for children and their mothers. In the MOBAND-CP cohort, 438 children with CP have been identified through record linkage with validated national registries, providing by far the largest such sample with prospectively collected detailed pregnancy data. Several studies investigating various hypotheses regarding CP aetiology are currently on-going.Future plansAdditional data can be harmonised as necessary to meet requirements of new projects. Biological specimens collected during pregnancy and at delivery are potentially available for assay, as are results from assays conducted on these specimens for other projects. The study size allows consideration of CP subtypes, which is rare in aetiological studies of CP. In addition, MOBAND-CP provides a platform within the context of a merged birth cohort of exceptional size that could, after appropriate permissions have been sought, be used for cohort and case-cohort studies of other relatively rare health conditions of infants and children.
Seizures are often found in children with fetal alcohol syndrome, but it is not known whether binge drinking during pregnancy by nonalcoholic women is associated with an increased risk of seizure ...disorders in children. The authors conducted a population-based cohort study of 80,526 liveborn singletons in the Danish National Birth Cohort (1996–2002). Information on maternal binge drinking (intake of ≥5 drinks on a single occasion) was collected in 2 computer-assisted telephone interviews during pregnancy. Children were followed for up to 8 years. Information on neonatal seizures, epilepsy, and febrile seizures was retrieved from the Danish National Hospital Register. Results showed that exposure to binge drinking episodes during pregnancy was not associated with an increased risk of seizure disorders in children, except for those exposed at 11–16 gestational weeks. These children had a 3.15-fold increased risk of neonatal seizures (95% confidence interval: 1.37, 7.25) and a 1.81-fold increased risk of epilepsy (95% confidence interval: 1.13, 2.90). These findings suggest that maternal binge drinking during a specific time period of pregnancy may be associated with an increased risk of specific seizure disorders in the offspring. The results are exploratory, however, and need to be replicated.
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