Maternal psychosocial stress and children's ADHD diagnosis: a prospective birth cohort study

Exploring Risk Factors for ADHD Among Children at a Mongolian Public School: A Cross-Sectional Analysis

INTRODUCTION

Attention Deficit Hyperactivity Disorder (ADHD) is a complex neurodevelopmental disorder with numerous hypothesized risk factors that have not yet been thoroughly investigated in many non-Western populations, including Mongolian schoolchildren. Exploring these risk factors could yield insight on which children are more likely to be impacted and on how risk differs across locations and cultures.

OBJECTIVE

The aim of the study was to assess whether elevated scores reported by parents and teachers on the Conners-3 Assessment, a detailed survey tool used to assess ADHD symptoms, correspond with indicators of lower socioeconomic status.

METHODS

We conducted a cross-sectional analysis involving 201 schoolchildren aged 8 to 13 attending a public school in Ulaanbaatar, Mongolia. We investigated associations between factors including student age, parental education level, family income, exposure to cigarette smoke, calcium intake and vitamin D status with Conners-3 scores for inattention, hyperactivity, and defiance/aggression. Cohen's d effect sizes and adjusted mean differences (aMD) for Conners-3 scores between groups were calculated using multivariable analysis.

RESULTS

Our findings revealed large effect sizes between different types of accommodation, a key indicator of socioeconomic status in modern Mongolia, and moderate effect sizes between different levels of parental education. Other findings included that engaging in over 2 hr of outdoor activity was independently associated with an increased inattention score (aMD 0.53, 95% CI [0.03, 1.03]) and increased hyperactivity score (aMD 0.63, 95% CI [0.10, 1.16]). A lower household income was independently associated with an increased inattention score (aMD 0.0005, 95% CI [0.000011, 0.001042]) and increased defiance/aggression score (aMD 0.0009, 95% CI [0.0004, 0.0015]). Factors such as calcium intake, Vitamin D level, exposure to cigarette smoke, and parental employment status did not yield significant associations.

CONCLUSION

We found that Conners-3 scores indicating higher symptoms of ADHD among Mongolian schoolchildren were associated with lower household income and high outdoor activity, and should be further investigated in relation to type of accommodation.

Prevalence and risk factors of attention deficit hyperactive disorder among children aged 6-17 years in arbaminch City, Gamo zone, Southern Ethiopia: a community-based cross-sectional study

INTRODUCTION

Attention deficit hyperactivity disorder (ADHD) is among the most common neurodevelopmental diseases affecting children and adolescents all over the world. There is limited evidence on the magnitude of ADHD among children in the Southern Nation and Nationality region in Ethiopia. Therefore, this study aimed to assess the magnitude and associated factors of ADHD among children aged 6-17 years in Arba Minch town, Southern Ethiopia.

METHODS

A community-based cross-sectional study was conducted in Arba Minch city from April 5 to May 5, 2023. A study included 520 participants. A multistage sampling followed by systematic random sampling was used to select the study participants. The Vanderbilt ADHD diagnostic DSM-IV criteria using a pre-tested, structured questionnaire with a face-to-face interview were used to assess the outcome. For data entry and analysis, Epi Info version 7 and STATA version 14 software were used, respectively. Variables with a p < 0.25 from the bivariate analysis were considered for the multivariable analysis. The multivariable logistic regression analysis was performed to identify statistically significant variables with a p-value of < 0.05. The adjusted odds ratio presented the strength of the association with a 95% confidence interval.

RESULT

The prevalence of ADHD was found to be 9.77% (95% CI; 7.47-12.66) in Arbaminch city. Family history of mental illness (AOR = 2.27; 95% CI: 1.15-4.45), children with a history of previous mental health problems (AOR = 7.11; 95% CI: 1.66-30.41), children whose mothers used alcohol during pregnancy (AOR = 3.36; 95% CI: 1.41-7.99), and children whose mothers smoked tobacco during their lifetime (AOR = 4.17; 95% CI: 1.05-16.89) were significantly associated with attention-deficit hyperactivity disorder.

CONCLUSION

According to this study, one in ten children in Arbaminch City, Ethiopia, is diagnosed with ADHD. Key predictors of ADHD include a prior history of mental illness in the child, maternal smoking, alcohol consumption during pregnancy, and a family history of mental disorders. Consequently, children with previous mental health issues and those from families with a history of mental illness should receive special attention. Additionally, expectant mothers must be informed about the harmful effects of alcohol and tobacco consumption on fetal development.

Prenatal maternal stress, breastfeeding and offspring ADHD symptoms

There is increasing evidence to suggest that environmental factors are associated with ADHD, but results regarding prenatal maternal stress, unwanted pregnancy, breastfeeding, and ADHD in children are controversial and few prospective studies have been conducted. Using prospectively collected data from the Northern Finland Birth Cohort 1986 (n = 7,910) we studied potential risk factors for ADHD symptoms at 8 and 16 years of age, including prenatal maternal stress and unwanted pregnancy, and protective factors including the duration of breastfeeding. Prenatal stress was associated with an increased risk of ADHD symptoms at the age of 16 (OR = 1.95, 95% CI: 1.34-2.80) and an unwanted pregnancy correlated with hyperactivity symptoms in the offspring at the age of 8 (OR = 2.08, 95% CI: 1.55-2.77). We did not find an association between prenatal maternal stress and hyperactivity symptoms in the offspring at the age of 8 (OR = 0.87, 95% CI: 0.69-1.08) or with unwanted pregnancy and ADHD symptoms at the age of 16 (OR = 1.13, 95% CI: 0.57-2.02). In relation to breastfeeding, over three months of exclusive breastfeeding was associated with lower hyperactivity symptoms in the 8-year follow-up (OR = 0.65, 95% CI: 0.46-0.92) and there was evidence of same kind of relationship concerning non-exclusive breastfeeding, but the association was not statistically significant (OR = 0.76, 95% CI: 0.54-1.06). In 16-year follow-up, under six months of non-exclusive breastfeeding showed an association with ADHD symptoms (OR = 0.68, 95% CI: 0.48-0.95) while exclusive breastfeeding did not (OR = 1.00, 95% CI: 0.66-1.55). In conclusion, our findings suggest that prenatal maternal stress increases the risk of more severe forms of ADHD symptoms in the offspring and breastfeeding can protect against such symptoms at the ages of 8 and 16.

Prevalence of ADHD among Black Youth Compared to White, Latino and Asian Youth: A Meta-Analysis

OBJECTIVE

To systematically review the prevalence of Attention Deficit Hyperactivity Disorder (ADHD) among Black children and adolescents compared to White, Latino and Asian children and adolescents.

METHOD

Peer-reviewed articles were identified in seven databases and included if they reported prevalence of ADHD among Black children and adolescents living in a minority context and compared rates to at least one of White, Latino or Asian samples. A total of 7050 articles were retrieved and 155 articles were subjected to full evaluation. Twenty-three studies representing 26 independent samples were included.

RESULTS

The pooled sample size was n = 218,445 (k = 26), n = 835,505 (k = 25), n = 493,417 (k = 24), and n = 66,413 (k = 7) of Black, White, Latino, and Asian participants, respectively. Pooled prevalence rate of ADHD was 15.9% (95%CI 11.6% - 20.7%) among Black children and adolescents, 16.6% (95%CI 11.6% - 22.2%) among Whites, 10.1% (95%CI 6.9% - 13.8%) among Latinos and 12.4% (95%CI 1.4% - 31.8%) among Asians. There was no significant difference in prevalence between ethnic groups, whereas both Black and White children and adolescents had marginally statistically significant higher prevalence than Asians. The results of a meta-regression analysis showed no moderating effects of the type of sample and the year of publication of studies. A significant publication bias was observed, suggesting that other moderators were not identified in the present systematic review.

CONCLUSION

In contrast to the assertion in the DSM-5 that clinical identification among Black children and adolescents is lower than among White children and adolescents, the present meta-analysis suggests similar rates of ADHD among these two groups. The importance of considering cultural appropriateness of assessment tools and processes is emphasized.

Stressful life events in electronic health records: a scoping review

OBJECTIVES

Stressful life events, such as going through divorce, can have an important impact on human health. However, there are challenges in capturing these events in electronic health records (EHR). We conducted a scoping review aimed to answer 2 major questions: how stressful life events are documented in EHR and how they are utilized in research and clinical care.

MATERIALS AND METHODS

Three online databases (EBSCOhost platform, PubMed, and Scopus) were searched to identify papers that included information on stressful life events in EHR; paper titles and abstracts were reviewed for relevance by 2 independent reviewers.

RESULTS

Five hundred fifty-seven unique papers were retrieved, and of these 70 were eligible for data extraction. Most articles (n = 36, 51.4%) were focused on the statistical association between one or several stressful life events and health outcomes, followed by clinical utility (n = 15, 21.4%), extraction of events from free-text notes (n = 12, 17.1%), discussing privacy and other issues of storing life events (n = 5, 7.1%), and new EHR features related to life events (n = 4, 5.7%). The most frequently mentioned stressful life events in the publications were child abuse/neglect, arrest/legal issues, and divorce/relationship breakup. Almost half of the papers (n = 7, 46.7%) that analyzed clinical utility of stressful events were focused on decision support systems for child abuse, while others (n = 7, 46.7%) were discussing interventions related to social determinants of health in general.

DISCUSSION AND CONCLUSIONS

Few citations are available on the prevalence and use of stressful life events in EHR reflecting challenges in screening and storing of stressful life events.

Early Life Origins of Neurodevelopmental Disabilities in the Boston Birth Cohort: Research findings and future directions

Neurodevelopmental disabilities (NDD) are a group of conditions with onset in early development period and is characterized by limitations in several functional domains. Autism spectrum disorder (ASD) and Attention-Deficit Hyperactivity Disorders (ADHD), the most common NDDs, have complex etiologies and possibly multiple pathways leading up to the manifestation of these disorders. Boston Birth Cohort (BBC) is a preterm enriched birth cohort, and over the years, researchers have used the BBC dataset to study a broad spectrum of early life protective and risk factors in the context of NDDs. Broadly, some of them include: 1) nutrition (e.g. maternal folate, vitamin B12, cord folate species, selenium), 2) metabolic factors (e.g. role of maternal diabetes, obesity, branched chain amino acids and other essential amino acids), 3) lipid metabolism (e.g. maternal cholesterol), 4) immune activation and/or systematic inflammation (including maternal immune activation, inflammation of the placenta, inflammatory markers, maternal antibiotic use and acetaminophen use), and 5) other factors associated with NDDs (e.g. maternal stress, sickle cell disease). The findings from these studies are discussed in this review. BBC studies have advanced the field of NDD in the following important ways: 1) generating evidence that sheds light on new exposures, 2) furthering the existing knowledge using better methodological approaches, 3) analyzing novel mechanistic pathways on already proven relationship, and 4) advancing knowledge on the under-studied minority population in the U.S. BBC researchers are involved in ongoing efforts to characterize NDD developmental trajectories across the life stages by integrating multi-omics data (genome, epigenome, and metabolome) to gain a deeper understanding of the molecular pathways by which early life factors drive or shape the developmental trajectories of NDDs.

Stressful life events in electronic health records: a scoping review

Objective

Stressful life events, such as going through divorce, can have an important impact on human health. However, there are challenges in capturing these events in electronic health records (EHR). We conducted a scoping review aimed to answer two major questions: how stressful life events are documented in EHR and how they are utilized in research and clinical care.

Materials and Methods

Three online databases (EBSCOhost platform, PubMed, and Scopus) were searched to identify papers that included information on stressful life events in EHR; paper titles and abstracts were reviewed for relevance by two independent reviewers.

Results

557 unique papers were retrieved, and of these 70 were eligible for data extraction. Most articles (n=36, 51.4%) were focused on the statistical association between one or several stressful life events and health outcomes, followed by clinical utility (n=15, 21.4%), extraction of events from free-text notes (n=12, 17.1%), discussing privacy and other issues of storing life events (n=5, 7.1%), and new EHR features related to life events (n=4, 5.7%). The most frequently mentioned stressful life events in the publications were child abuse/neglect, arrest/legal issues, and divorce/relationship breakup. Almost half of the papers (n=7, 46.7%) that analyzed clinical utility of stressful events were focused on decision support systems for child abuse, while others (n=7, 46.7%) were discussing interventions related to social determinants of health in general.

Discussion and Conclusions

Few citations are available on the prevalence and use of stressful life events in EHR reflecting challenges in screening and storing of stressful life events.

Stressful life events in electronic health records: a scoping review

Objective

Stressful life events, such as going through divorce, can have an important impact on human health. However, there are challenges in capturing these events in electronic health records (EHR). We conducted a scoping review aimed to answer two major questions: how stressful life events are documented in EHR and how they are utilized in research and clinical care.

Materials and Methods

Three online databases (EBSCOhost platform, PubMed, and Scopus) were searched to identify papers that included information on stressful life events in EHR; paper titles and abstracts were reviewed for relevance by two independent reviewers.

Results

557 unique papers were retrieved, and of these 70 were eligible for data extraction. Most articles (n=36, 51.4%) were focused on the statistical association between one or several stressful life events and health outcomes, followed by clinical utility (n=15, 21.4%), extraction of events from free-text notes (n=12, 17.1%), discussing privacy and other issues of storing life events (n=5, 7.1%), and new EHR features related to life events (n=4, 5.7%). The most frequently mentioned stressful life events in the publications were child abuse/neglect, arrest/legal issues, and divorce/relationship breakup. Almost half of the papers (n=7, 46.7%) that analyzed clinical utility of stressful events were focused on decision support systems for child abuse, while others (n=7, 46.7%) were discussing interventions related to social determinants of health in general.

Discussion and Conclusions

Few citations are available on the prevalence and use of stressful life events in EHR reflecting challenges in screening and storing of stressful life events.

Addressing the smoking-hypertension paradox in pregnancy: insight from a multiethnic US birth cohort

Background

Smoking during pregnancy has been associated with reduced risk of a spectrum of hypertensive (HTN) disorders, known as the "smoking-hypertension paradox."

Objective

We sought to test potential epidemiologic explanations for the smoking-hypertension paradox.

Methods

We analyzed 8510 pregnant people in the Boston Birth Cohort, including 4027 non-Hispanic Black and 2428 Hispanic pregnancies. Study participants self-reported tobacco, alcohol, cannabis, opioids, or cocaine use during pregnancy. We used logistic regression to assess effect modification by race/ethnicity, and confounding of concurrent substances on hypertensive disorders or prior pregnancy. We also investigated early gestational age as a collider or competing risk for pre-eclampsia, using cause-specific Cox models and Fine-Gray models, respectively.

Results

We replicated the paradox showing smoking to be protective against hypertensive disorders among Black participants who used other substances as well (aOR: 0.61, 95% CI: 0.41, 0.93), but observed null effects for Hispanic participants (aOR: 1.14, 95% CI: 0.55, 2.36). In our cause-specific Cox regression, the effects of tobacco use were reduced to null effects with pre-eclampsia (aOR: 0.81, 95% CI: 0.63, 1.04) after stratifying for preterm birth. For the Fine-Gray competing risk analysis, the paradoxical associations remained. The smoking paradox was either not observed or reversed after accounting for race/ethnicity, other substance use, and collider-stratification due to preterm birth.

Conclusions

These findings offer new insights into this paradox and underscore the importance of considering multiple sources of bias in assessing the smoking-hypertension association in pregnancy.

Prospective associations between various prenatal exposures to maternal psychological stress and neurodevelopment in children within 24 months after birth

BACKGROUND

There is increasing evidence that prenatal exposure to maternal psychological distress may be a factor influencing offspring neurodevelopment, but stress type-dependent effects of maternal psychological distress on offspring neurodevelopment in early childhood have yet to be fully elucidated. Additionally, although positive maternal mental health exerts potential effects in protecting against adverse health outcomes, few investigators have considered the effects of positive maternal mental health on offspring neurodevelopment in early childhood.

AIMS

To determine the associations between various prenatal exposures to maternal psychological distress and positive life-event experiences and offspring neurodevelopment within 24 months of age.

METHODS

A total of 4412 mother-child dyads were recruited from the Shanghai Maternal-Child Pairs Cohort (Shanghai MCPC). Maternal perceived stress, negative life-event stress, positive life-event experiences around the time of conception (i.e., three months prior to and after conception) were assessed at 12-16 gestational weeks, and maternal anxiety and depressive symptoms were assessed at 32-36 gestational weeks. We measured children's neurodevelopment using the Ages and Stages Questionnaire, Third Edition (ASQ-3) at two, six, 12, and 24 months postnatally. We then exploited generalized linear models to estimate the associations between prenatal maternal psychological distress and positive life-event experiences and children's neurodevelopment at the above periods, and generalized linear mixed models were applied to assess the associations between maternal psychological distress and positive life-event experiences and suspected developmental delay (SDD) in children within 24 months after birth based on a longitudinal design.

RESULTS

Maternal perceived stress and negative life-event stress around the time of conception, and anxiety and depressive symptoms during late pregnancy were negatively associated with scores of children's neurodevelopment at two, six, 12, and 24 months of age; while maternal life-event experiences were positively associated with scores of children's neurodevelopment. Longitudinal analysis revealed that higher levels of maternal negative life-event stress and depressive symptoms augmented the risk of SDD in personal-social (OR = 1.435, 1.681). Mothers who experienced higher levels of positive life-event experiences exhibited a reduced risk of SDD in gross motor and personal-social domains (OR = 0.373, 0.350).

CONCLUSIONS

Prenatal exposure to maternal psychological distress is negatively associated with children's neurodevelopment in early childhood depending upon the type of distress. Maternal positive life-event experiences around the time of conception appeared to present potential benefits for child neurodevelopment.

Predictors of Attention Deficit Hyperactivity Disorder in Sri Lankan Children: A School Based Community Study

OBJECTIVE

To evaluate potential risk-factors of ADHD among primary school-children (PSC) in state schools in Colombo district of Sri Lanka.

METHOD

A case-control study was conducted with 73 cases and 264 controls selected randomly among 6 to 10-year-old PSC from Sinhala medium state schools in Colombo district. Primary care givers completed the SNAP-IV P/T-S scale to screen for ADHD and an interviewer-administered questionnaire on risk-factors. Children's diagnostic status was confirmed by a Consultant Child and Adolescent Psychiatrist based on DSM-5 criteria.

RESULTS

A binomial regression model identified male sex (aOR = 3.45; 95% CI [1.65, 7.18]), lower educational level of the mother (aOR = 2.99; 95% CI [1.31, 6.48]), birth weight <2,500 g (aOR = 2.83; 95% CI [1.17, 6.81]),a neonatal complications (aOR = 3.82; 95% CI [191, 7.65]) and child having witnessed verbal/emotional aggression between parents (aOR = 2.08; 95% CI [1.01, 4.27])as significant predictors of ADHD.

CONCLUSION

Primary prevention should focus on strengthening neonatal, maternal and child health services within the country.

Prevalence and Risk Factors of Attention Deficit-Hyperactivity Disorder in the Saudi Population: A Systematic Review and Meta-analysis

Objectives

To determine the prevalence and risk factors of attention deficit hyperactivity disorder (ADHD) in Saudi Arabia.

Methods

Observational studies (case-control, cohort, and cross-sectional) that reported the prevalence and risk factors of ADHD among Saudis and were published in English were included. In March 2022, a computerized search was conducted on Medline (via PubMed), Web of Science, and Scopus using keywords associated with ADHD and Saudi Arabia. Two-stage screening and data extraction were performed. The National Institutes of Health Quality Assessment Tool for Observational Cohort and Cross-sectional studies was used for the quality assessment. A random-effects model was used to estimate the prevalence. The Comprehensive Meta-analysis program was used for the analysis.

Results

Fourteen studies (N = 455,334 patients) were included. The pooled prevalence of ADHD in the Saudi population was 12.4% (95% CI: 5.4%-26%). For ADHD-Inattentive and ADHD-Hyperactive presentations, the prevalence was 2.9% (95% CI: 0.3%-23.3%) and 2.5% (95% CI: 0.2%-20.5%), respectively. Regarding the combined AD and HD, the prevalence was 2.5% (95% CI: 0.2%-20.5%). Children of women with psychological disorders during pregnancy (P = 0.043), insufficient vitamin B during pregnancy (P = 0.006), allergic reactions (P = 0.032), and disabling symptoms of muscle pain during pregnancy (P = 0.045) were associated with an increased risk of ADHD.

Conclusions

The prevalence of ADHD in the Saudi population is comparable with that in other countries from the Middle East and North Africa region. Careful monitoring of pregnant women, attention to nutritional sufficiency, psychological and emotional support, and avoidance of stressful events may lead to reducing the incidence of ADHD in the offspring.

Funding

None.

Registration

PROSPERO (Ref no.: CRD42023390040).

Evaluation of a Child-centred Psychosocial Healthcare Intervention (KIDPROTEKT) - Results of a Cluster Randomized Controlled Trial in Paediatric and Gynaecologic Practices

KID-PROTEKT is a child-centred psychosocial healthcare intervention which aims at improving the identification of psychosocial needs and navigation in the outpatient gynaecologic and paediatric setting. In this cluster randomized-controlled trail we examined the effect of KID-PROTEKT on the referrals (to support services) in comparison to the regular gynaecologic and paediatric outpatient healthcare . A variant based on the qualification of the healthcare providers (qualified treatment, QT) and a variant with social worker (supported treatment, ST) were compared to the regular healthcare (treatment as usual, TAU). Twenty-four gynaecologic and paediatric practices were randomized to one of three study arms. Therefore 8,458 pregnant women and families recruited in one of these practices were enrolled in the study. Participating patients reported on average 1.73 (SD = 1.34) psychosocial risks. In total 522 patients were linked to a support service. Compared to TAU, the probability of a referral was significantly higher in QT (OR = 10.70) and ST (OR = 11.28). Also, a higher number of psychosocial risks were linked to a referral (OR = 2.72). These findings support the importance of a psychosocial assessment in the gynaecologic and paediatric setting.

Moderation of parental socioeconomic status on the relationship between birth health and developmental coordination disorder at early years

Objective

This study investigated whether parental SES moderates the effect of birth health on Developmental Coordination Disorder (DCD) in preschool children.

Methods

One hundred and twenty-two children aged 4 to 6 years were enrolled in the study. The Movement Assessment Battery for Children --2nd Edition (MABC-2) test was used to assess the motor coordination of children. They were preliminarily categorized into either the DCD (<=16th percentile, n = 23) or typically developing (TD) group (>16th percentile, n = 99) based on the testing results. All children in the DCD group were further confirmed to meet other diagnostic criteria of the DSM-V using the intellectual test and parental questionnaires. Moderation analysis was conducted using the PROCESS macro for SPSS, and 95% confidence intervals with a bootstrap procedure were calculated to identify the significant moderating effect.

Results

Maternal education (unstandardized coefficient = 0.6805, SE = 0.3371, p < 0.05) and maternal employment status (unstandardized coefficient = 0.6100, SE = 0.3059, p < 0.05) were found to moderate the relationship between birth length and the probability of having DCD. Moreover, the relationship between birth weight and the probability of having DCD was moderated by the annual household income (unstandardized coefficient = -0.0043, SE = 0.0022, p < 0.05).

Conclusion

The lower maternal education level and maternal unemployment strengthened the negative relationship between birth length and the probability of having DCD. Additionally, the negative relationship between birth weight and the probability of having DCD was statistically significant in high annual household salaries.

Prenatal and early postnatal exposure to a natural disaster and Attention-Deficit/Hyperactivity Disorder symptoms in Indian children

The aim of this study was to assess the relation between early exposure to stressful events and symptoms of the Attention-Deficit/Hyperactivity Disorder (ADHD) in children, based on the outcomes from a natural experiment. It was hypothesized that children pre- and postnatally exposed to cyclone Aila have increased ADHD symptoms compared to the control group, and the effect depends on the timing of the exposure. Indian children (8–11 years) prenatally (N = 336) and early postnatally (N = 216) exposed to cyclone Aila were compared to a non-exposed control peer group (N = 285). ADHD symptoms were assessed using the Conner’s Teacher Rating Scale Revised. The main effect of exposure to the cyclone on the total ADHD symptoms’ score, ADHD index, Hyperactivity and Oppositional symptoms was significant and independent to covariates: age and sex of children, gestational age and birth weight, maternal stress during the year before the study and the socioeconomic status of a family. The timing of exposure and sex of the children were found to be a significant moderator of the relation between early exposure to the natural disaster and ADHD symptoms. The prenatal, but also early postnatal exposure to stressful experiences such as a natural disaster, may disturb the development of cognitive functions and behavioural control, thus increasing the risk of ADHD in children.

Attention deficit hyperactivity disorder among children related to maternal job stress during pregnancy in Taiwan: a prospective cohort study

OBJECTIVE

Attention deficit hyperactivity disorder (ADHD) is the most common neurobehavioral disorders. Although studies have suggested relationships between ADHD in children and maternal psychosocial stress during pregnancy, little is known about the effects of work-related mental stress. Considering the increasing number of pregnant women who continue to work during the gestation period, this study investigated whether work-related stress during pregnancy is related to offspring ADHD.

METHODS

The Taiwan Birth Cohort Study followed selected representative mother-infant pairs in a face-to-face interview since a child was 6 months old. A total of 10,556 working pregnant women who completed follow-up 8 years later were included. Whether the 8-year-old child had ever received a diagnosis of ADHD were inquired. Self-reported job stress during pregnant period was obtained 6 months after delivery. Factors including perinatal and socioeconomic factors as well as the mother's job conditions were further analyzed with logistic regression.

RESULTS

Among those who continued working during pregnancy, 3850 (36.5%) mothers reported having job stress during pregnancy, and 210 (2.0%) of the children were diagnosed as having ADHD before 8 years of age. Compared with mothers who reported no job stress, the adjusted odds ratio of child ADHD was 1.91 (95% CI 1.21-3.07) for mothers with "very stressful" jobs during pregnancy and 1.53 (95% CI 1.04-2.25) for mothers with "rather stressful" jobs.

CONCLUSION

Among pregnant female workers, higher levels of job stress were related to the higher occurrence of ADHD in their children.

Inflammation, Anxiety, and Stress in Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a prevalent and serious neurodevelopmental disorder characterized by symptoms of inattention and/or hyperactivity/impulsivity. Chronic and childhood stress is involved in ADHD development, and ADHD is highly comorbid with anxiety. Similarly, inflammatory diseases and a pro-inflammatory state have been associated with ADHD. However, while several works have studied the relationship between peripheral inflammation and stress in affective disorders such as depression or bipolar disorder, fewer have explored this association in ADHD. In this narrative review we synthetize evidence showing an interplay between stress, anxiety, and immune dysregulation in ADHD, and we discuss the implications of a potential disrupted neuroendocrine stress response in ADHD. Moreover, we highlight confounding factors and limitations of existing studies on this topic and critically debate multidirectional hypotheses that either suggest inflammation, stress, or anxiety as a cause in ADHD pathophysiology or inflammation as a consequence of this disease. Untangling these relationships will have diagnostic, therapeutic and prognostic implications for ADHD patients.

Maternal prenatal selenium levels and child risk of neurodevelopmental disorders: A prospective birth cohort study

Selenium (Se) is an essential trace element involved in various biological processes, including neurodevelopment. Available literature indicates that both Se deficiency and excess may be detrimental to health. It is also known that Se can cross the placenta from maternal to fetal circulation. To date, the role of maternal Se status in child long-term neurodevelopment is largely unexplored. This study investigated the temporal and dose-response associations between maternal Se status and child risk of neurodevelopmental disorders including autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD). It consisted of 1550 mother-infant dyads from the Boston Birth Cohort. Maternal red blood cell (RBC) Se levels were measured in samples collected within 72 h of delivery (biomarker of third trimester Se status). Pediatric neurodevelopmental diagnoses were obtained from electronic medical records. Data analyses showed that maternal RBC Se levels were positively associated with child risk of developing ASD, with an adjusted odds ratio of 1.49 for ASD (95% CI: 1.09, 2.02) per IQR increase in Se. There was also a positive association between maternal Se and ADHD (OR: 1.29; 95% CI: 1.04, 1.56, per IQR increase in Se). These associations remained robust even after adjusting for pertinent covariables; and there was no significant interaction between Se and these covariables. Our findings suggest that prenatal exposure to high maternal Se levels may adversely affect child neurodevelopment. Our findings warrant further investigation; if confirmed, optimizing maternal prenatal Se levels may be necessary to maximize its health benefits while preventing undue risk.

Ways to Address Perinatal Mast Cell Activation and Focal Brain Inflammation, including Response to SARS-CoV-2, in Autism Spectrum Disorder

The prevalence of autism spectrum disorder (ASD) continues to increase, but no distinct pathogenesis or effective treatment are known yet. The presence of many comorbidities further complicates matters, making a personalized approach necessary. An increasing number of reports indicate that inflammation of the brain leads to neurodegenerative changes, especially during perinatal life, "short-circuiting the electrical system" in the amygdala that is essential for our ability to feel emotions, but also regulates fear. Inflammation of the brain can result from the stimulation of mast cells-found in all tissues including the brain-by neuropeptides, stress, toxins, and viruses such as SARS-CoV-2, leading to the activation of microglia. These resident brain defenders then release even more inflammatory molecules and stop "pruning" nerve connections, disrupting neuronal connectivity, lowering the fear threshold, and derailing the expression of emotions, as seen in ASD. Many epidemiological studies have reported a strong association between ASD and atopic dermatitis (eczema), asthma, and food allergies/intolerance, all of which involve activated mast cells. Mast cells can be triggered by allergens, neuropeptides, stress, and toxins, leading to disruption of the blood-brain barrier (BBB) and activation of microglia. Moreover, many epidemiological studies have reported a strong association between stress and atopic dermatitis (eczema) during gestation, which involves activated mast cells. Both mast cells and microglia can also be activated by SARS-CoV-2 in affected mothers during pregnancy. We showed increased expression of the proinflammatory cytokine IL-18 and its receptor, but decreased expression of the anti-inflammatory cytokine IL-38 and its receptor IL-36R, only in the amygdala of deceased children with ASD. We further showed that the natural flavonoid luteolin is a potent inhibitor of the activation of both mast cells and microglia, but also blocks SARS-CoV-2 binding to its receptor angiotensin-converting enzyme 2 (ACE2). A treatment approach should be tailored to each individual patient and should address hyperactivity/stress, allergies, or food intolerance, with the introduction of natural molecules or drugs to inhibit mast cells and microglia, such as liposomal luteolin.

Maternal and cord plasma branched-chain amino acids and child risk of attention-deficit hyperactivity disorder: a prospective birth cohort study

BACKGROUND

Branched-chain amino acids (BCAA: leucine, isoleucine, and valine) are essential amino acids involved in biological functions of brain development and recently linked with autism. However, their role in attention-deficit hyperactivity disorder (ADHD) is not well-studied. We investigated individual and combined relationships of maternal plasma and newborn cord plasma BCAAs with childhood development of ADHD.

METHODS

We utilized the Boston Birth Cohort, a predominantly urban, low-income, US minority population. Child developmental outcomes were defined in three mutually exclusive groups - ADHD, neurotypical (NT), or other developmental disabilities based on physician diagnoses per ICD-9 or 10 in medical records. The final sample included 626 children (299 ADHD, 327 NT) excluding other developmental disabilities. BCAAs were measured by liquid chromatography-tandem mass spectrometry. We used factor analysis to create composite scores of maternal and cord BCAA, which we divided into tertiles. Logistic regressions analyzed relationships between maternal or cord BCAA tertiles with child ADHD risk, controlling for maternal race, age, parity, smoking, education, low birth weight, preterm birth, and child sex. Additionally, we analyzed maternal and cord plasma BCAAs jointly on child ADHD risk.

RESULTS

Adjusted logistic regression found significantly increased odds of child ADHD diagnosis for the second (OR 1.63, 95% CI: 1.04, 2.54, p = .032) and third tertiles (OR 2.01, 95% CI: 1.28, 3.15, p = .002) of cord BCAA scores compared to the first tertile. This finding held for the third tertile when further adjusting for maternal BCAA score. There was no significant association between maternal BCAA score and child ADHD risk, nor a significant interaction between maternal and cord BCAA scores.

CONCLUSIONS

In this prospective US birth cohort, higher cord BCAA levels were associated with a greater risk of developing ADHD in childhood. These results have implications for further research into mechanisms of ADHD development and possible early life screening and interventions.

Pregnancy Outcome during the First COVID 19 Lockdown in Vienna, Austria

The COVID 19 pandemic represents a major stress factor for non-infected pregnant women. Although maternal stress during pregnancy increases the risk of preterm birth and intrauterine growth restriction, an increasing number of studies yielded no negative effects of COVID 19 lockdowns on pregnancy outcome. The present study focused on pregnancy outcome during the first COVID 19 lockdown phase in Austria. In particular, it was hypothesized that the national lockdown had no negative effects on birth weight, low birth weight rate and preterm birth rate. In a retrospective medical record-based single center study, the outcome of 669 singleton live births in Vienna Austria during the lockdown phase between March and July 2020 was compared with the pregnancy outcome of 277 live births at the same hospital during the pre-lockdown months of January and February 2020 and, in addition, with the outcome of 28,807 live births between 2005 and 2019. The rate of very low gestational age was significantly lower during the lockdown phase than during the pre-lockdown phase. The rate of low gestational age, however, was slightly higher during the lockdown phase. Mean birth weight was significantly higher during the lockdown phase; the rates of low birth weight, very low birth weight and extremely low birth weight were significantly lower during the lockdown phase. In contrast, maternal gestational weight gain was significantly higher during the lockdown phase. The stressful lockdown phase in Austria seems to have no negative affect on gestational length and newborn weight among non-infected mothers.

Testing the Independent and Joint Contribution of Exposure to Neurodevelopmental Adversity and Childhood Trauma to Risk of Psychotic Experiences in Adulthood

Exposure to neurodevelopmental adversity and childhood trauma are both independently associated with psychosis. However, there is little research on the mechanism underlying their relationship with each other. The current study investigated both the independent and joint effects of neurodevelopmental adversity and childhood trauma to better understand the etiology of psychosis. A large population-based cohort (N = 3514) followed from birth was assessed on psychotic experiences (PE) at 24 years. Neurodevelopmental adversity included obstetric complications (birth weight, gestational age, in-utero influenza exposure, resuscitation) and developmental impairment (cognitive and motor impairments). Trauma exposure included caregiver and peer inflicted trauma up to 17 years. Multiple regression models tested their independent and interactive effect on PE, and path analysis estimated the indirect effect of neurodevelopmental adversity on PE via trauma. Neurodevelopmental adversity (OR = 1.32, 95%CI: 1.08-1.62) and trauma (OR = 1.97, 95%CI: 1.65-2.36) independently increased the odds of PE. There was also an indirect relationship between neurodevelopmental adversity and PE via increased exposure to childhood trauma (β = 0.01, 95%CI: 0.004-0.024). In particular, peer bullying mediated the association between developmental impairment to PE (β = 0.02, 95%CI: 0.01-0.03). In conclusion, children with neurodevelopmental adversity, in particular those with developmental impairment, are more likely to be exposed to trauma. This new etiological understanding of psychosis suggests that PE may be partially modifiable through reducing exposure to peer bullying, especially in children with developmental impairment.

Family and developmental history of ADHD patients: a structured clinical routine interview identifies a significant profile

Similar to other neurodevelopmental disorders, the diagnosis of attention-deficit hyperactivity disorder (ADHD) is based on clinical and psychosocial assessment. This assessment is performed in clinical practice using the clinical routine interview technique. Domains of the clinical routine interview are, among others, present symptoms, history of present illness and family and developmental history. Family and developmental history are important parts in the diagnostic process of ADHD. In contrast to the domains of present symptoms and history of present illness, there are currently no structured interviews or rating scales available to thoroughly assess family and developmental history in ADHD. The aim of the study was to assess the profile of operationalized data from a structured clinical routine interview addressing family and developmental history from ADHD patients and control participants. A structured interview to assess family and developmental history was derived from the guidelines used at different university hospitals for Child and Adolescent Psychiatry as well as from the descriptions in leading textbooks. Based on these guidelines and descriptions, the interview was an optimization of possible questions. Clinical data were obtained from parents of male patients who had the diagnosis of ADHD between the ages of 12-17 years (n = 44), and of healthy controls (n = 41). Non-metric data were operationalized into three categories, 0-normal behavior, 1-minor pathological behavior, 2-major pathological behavior. ADHD patients express a profile that significantly differs from control participants. Comparison of significant items with the empirical ADHD literature indicates strong agreement. Our findings support the importance and feasibility of the clinical routine interview in family and developmental history in the context of diagnosing ADHD.

The stress-Wnt-signaling axis: a hypothesis for attention-deficit hyperactivity disorder and therapy approaches

Attention-deficit hyperactivity disorder (ADHD) is one of the most common psychiatric neurodevelopmental disorders in children and adolescents. Although ADHD has been studied for nearly a century, the cause and pathophysiology of ADHD is yet largely unknown. However, findings from previous studies have resulted in the formation of a new hypothesis: Apart from the well-known multifactorial etiology of ADHD, recent evidence suggests that the interaction between genetic and environmental factors and especially Wnt- and mTOR-signaling pathways might have an important role in the pathophysiology of ADHD. The Wnt-signaling pathway is known to orchestrate cellular proliferation, polarity, and differentiation, and the mTOR pathway is involved in several significant processes of neurodevelopment and synaptic plasticity. As a result, dysregulations of these pathways in a time-dependent manner could lead to neurodevelopmental delays, resulting in ADHD phenotype. This review presents further evidence supporting our hypothesis by combining results from studies on ADHD and Wnt- or mTOR-signaling and the influence of genetics, methylphenidate treatment, Omega-3 supplementation, and stress.

Association between prenatal exposure to a 1-month period of repeated rocket attacks and neuropsychiatric outcomes up through age 9: a retrospective cohort study

Exposure to gestational stress is implicated in increased risk for neuropsychiatric disorders in offspring. We assessed association between prenatal exposure to a 1-month period of repeated rocket attacks during the 2006 Second Lebanon War in Northern Israel and emergence of childhood neuropsychiatric disorders from birth through 9 years of age. Children born to women who were pregnant during the war (N = 6999) were identified and compared to children in the same district born a year later (N = 7054), whose mothers were not exposed to rocket attacks during pregnancy. Multivariable regression models assessed risk for attention deficit hyperactivity disorder, autism, epilepsy, depression and/or anxiety, or any of these disorders (composite outcome) in offspring. Models controlled for multiple confounders including parents' demographics, parity, maternal use of psychotropic medications during pregnancy, post-partum depression and parental psychiatric history. Results show that exposed and comparison groups did not differ with respect to demographics, parity or psychiatric history. Exposed and comparison groups were similar with regard to gestational age and weight at birth. Multivariable models did not demonstrate an association between exposure to rocket attacks during pregnancy and neuropsychiatric outcomes by age 9. No interactions were found between exposure and gestational trimester at exposure or child's sex. Our findings suggest that in utero exposure to isolated, 1-month repeated rocket attacks on a civilian population was not associated with major neuropsychiatric outcomes in children by age 9. Future studies should evaluate whether this exposure is associated with psychiatric and/or other health-related outcomes later in life.

Antenatal active maternal asthma and other atopic disorders is associated with ADHD behaviors among school-aged children

BACKGROUND

Identifying modifiable risk factors for neuropsychological correlates of attention deficit hyperactivity disorder (ADHD) in early childhood can inform prevention strategies. Prenatal inflammatory states, such as maternal asthma and other atopic disorders, have been increasingly linked to enhanced risk for neurobehavioral disorders in children, with some studies suggesting sex-specific effects.

OBJECTIVES

To assess the association between maternal active asthma and/or atopy in the antenatal period and child symptoms of ADHD during mid-childhood and, given the male-bias in ADHD prevalence, to examine modifying effects of child sex.

STUDY DESIGN

The study sample includes 250 maternal-child pairs enrolled in the Boston-based Asthma Coalition on Community, Environment and Social Stress (ACCESS) pregnancy cohort. We defined antenatal active atopy based on maternal report of current asthma, allergic rhinitis or atopic dermatitis during and/or in the year before pregnancy. When children were approximately 6 years old, mothers completed a battery of standardized child behavior rating scales designed for evaluating symptoms of ADHD. We used multivariable quantile regression to assess the relations between maternal antenatal atopy and symptoms of ADHD among children.

RESULTS

In adjusted models, maternal atopy was significantly associated with greater risk for ADHD behaviors, as indicated by scores on the Conners' Parent Rating Scale-Revised ADHD index (β = 3.32, 95% CI: 0.33, 6.32). In sex-stratified models this association was stronger among girls (5.96, 95% CI = 0.95, 10.96) compared to boys (-2.14, 95% CI = -5.75, 1.45, p-interaction = 0.01). Among girls, we observed a similar finding for the Behavior Assessment System for Children 2nd Edition Parent Rating Scale Attention Problems subscale (β = 7.77, 95% CI = 1.57, 13.97). Results from other outcome subscales were similar in magnitude and direction, however, associations did not reach statistical significance at the p = 0.05 level.

CONCLUSIONS

Maternal antenatal active atopy may be a risk factor for the development of ADHD-like symptoms, especially among girls.

Risk of Atopic Diseases among Siblings of Patients with Attention-Deficit Hyperactivity Disorder: A Nationwide Population-Based Cohort Study

BACKGROUND

Increasing evidence suggests a positive association between attention-deficit hyperactivity disorder (ADHD) and atopic diseases. However, the risk of atopic diseases in unaffected siblings of patients with ADHD has not been investigated.

OBJECTIVE

To investigate the risk of developing atopic diseases among unaffected siblings of ADHD probands.

METHODS

Using data from the Taiwan National Health Insurance Research Database, 20,170 unaffected siblings of patients with ADHD born between 1980 and 2000 and 80,680 age-, birth time-, and residence-matchedcontrols were included in this study. Diagnoses of atopic diseases, including asthma, atopic dermatitis, allergic rhinitis, and allergic conjunctivitis, were ascertained from 1996 or the birth time until the end of 2011.

RESULTS

Breslow-Cox proportional hazard regression analyses with adjustment for demographic data showed that compared with the controls, unaffected siblings of patients with ADHD had a higher risk of developing asthma (relative risk [RR], 1.19; 95% confidence interval [CI], 1.15-1.24), atopic dermatitis (RR, 1.10; 95% CI, 1.04-1.16), allergic rhinitis (RR, 1.17; 95% CI, 1.14-1.21), allergic conjunctivitis (RR, 1.13; 95% CI, 1.09-1.17), and any of these atopic diseases (RR, 1.13; 95% CI, 1.10-1.15).

CONCLUSION

The unaffected siblings of ADHD probands were more likely to develop atopic diseases compared with the controls, suggesting shared risk factors for both diseases.

Parental age and developmental milestones: pilot study indicated a role in understanding ADHD severity in Indian probands

Background

In different ethnic groups, birth related factors have shown significant influence in the etiology of Attention deficit hyperactivity disorder (ADHD). Based on these interesting findings, we aimed to investigate association between different pre- and post natal variables and ADHD associated traits in Indian subjects.

Methods

ADHD Probands recruited based on the DSM-IV, were assessed by the Conner’s Parent Rating Scale for behavioral problem (BPr), inattention (IA), hyperactivity (HA) and ADHD index (AI). Impulsivity (Imp) was assessed by the Tsukuyama scale.

Results

Higher paternal (Std β = 0.23) and lower maternal (Std β = 0.21) age showed significant association with Imp of the probands. Higher paternal age also revealed association with BPr (Std β = 0.18). Age of onset was distinctly associated with AI (Std β < 0.16) while developmental delay was negatively correlated with BPr, Imp, IA and birth weight (r < − 0.13); also confirmed by Posthoc-ANOVA (P < 0.05).

Conclusion

We infer that parental age, developmental delay and birth related variables may have a cumulative effect on ADHD symptom severity.

Electronic supplementary material

The online version of this article (10.1186/s12887-019-1483-x) contains supplementary material, which is available to authorized users.