Gender differences of children's developmental trajectory from 6 to 60 months in the Taiwan Birth Cohort Pilot Study

The parental report instrument is the most efficient developmental detection method and has shown high validity with professional assessment instruments. The reliability and validity of the Taiwan Birth Cohort Study (TBCS) 6-, 18- and 36-month scales have already been established. In this study, the reliability and validity of the 60-month scale was tested. The gender differences in children's longitudinal gross motor, fine motor, language and social development were also investigated. Using the dataset from the Taiwan Birth Cohort Pilot Study (TBCS-p), 2048 infants were followed up when they were 6-, 18-, 36- and 60-month-old. At the final stage, 1620 children were followed up. Development of the children was measured using the TBCS 6-, 18-, 36-, and 60-month developmental scales. The reconstructed TBCS 60-month scale yielded 16 items measuring children's development in the four dimensions of gross motor, fine motor, language and social. The scale yielded an internal consistency of 0.39-0.71. Structural equation modeling also showed good construct and predictive validity, in that the 6-, 18-, and 36-month scales were predictive of the 60-month scale. No gender differences between the gross motor dimension was found. Gender had an effect on the fine motor dimension at 36 and 60 months, language dimension at 36 months, and social dimension at 18, 36 and 60 months. Gender had a transient effect in language development and social development a continuous effect from 18 to 60 months. Thus different gender norms may need to be established to prevent misdiagnosis. The TBCS scale is a valid and reliable developmental screening instrument that can be used in continuous surveillance of children's development in community and clinical settings from 6 months to 5 years of age.     

Altered attainment of developmental milestones influences the age of diagnosis of rett syndrome

The early developmental history prior to the manifestation of Rett syndrome features is of clinical interest. This study describes the attainment of gross developmental milestones and regression, and assesses the relationships between genotype and age at diagnosis. The Australian Rett Syndrome Database and International Rett Syndrome Phenotype Database were used to source a total of 293 confirmed female subjects. Most girls learned to sit, were able to babble or use words, and approximately half learned to walk. Altered milestone attainment was associated with earlier diagnosis. There was variation in the acquisition of milestones, the age of regression, and the age of diagnosis by genotype. Most parents expressed concerns about unusual behaviors or development during infancy, and a more subtle atypical development during infancy was reported for most girls. It is important for clinicians to be aware of variable early development in Rett syndrome and that timely genetic testing is not precluded on this account.     

Predictors of developmental delay at 18 months and later school achievement problems

The aim of the study was to examine the predictive value of the variables of parental assessment score, pre-, peri-, and postpartum optimality, sex, socioeconomic status (SES), and maternal education with respect to developmental delay at 18 months, and intellectual disability and school achievement problems at 8 and 14 years. The sample studied comprised 101 children (53 low scorers and 48 controls) originally from a total population of 2783 children assessed by their parents at 18 months using a screening instrument. Data were analysed by logistic regression. The results yielded moderate but statistically significant correlations between predictor and outcome variables. Optimality score and maternal education were the best predictors of developmental delay at 18 months. At 8 years, parental assessment score and maternal education constituted the best predictors of school achievement problems. At 14 years, SES together with parental assessment score were included in the model, when school achievement problems were predicted. Parental assessment score showed the strongest association with school achievement problems at both 8 and 14 years, when children with intellectual disability were included in the analysis. The exclusion of children with intellectual disability from the analyses yielded a stronger association between maternal education (at 8 years) and SES (at 14 years) and school achievement problems. The overall classification accuracy of the models varied between 67% and 88%. Specificity varied from 65% at 18 months to 95% at 14 years. Sensitivity varied from 70% at 18 months and 55% (all cases) and 42% (children with intellectual disability excluded) at 14 years.     

Ethnic and age differences in mental health measurements.

Data gathered in a survey of 1441 respondents were analyzed to study the influence of chronologmost equal representation of six age groups (20-29, 30-39, 40-54, 55-64, 65-74, 75-94), and three ethnic groups (Blacks, Anglos, Mexican-Americans). The sample includes equal representation of both sexes and two socioeconomic levels. The Twenty-two Item Screening Scale and the Affect Balance Scale are used as measures of mental health. The analyses show age-related and ethnic-related patterns; each pattern, however, is independent of the other. The age-related pattern is the same within the three ethnic groups, and the ethnic pattern is independent of age. Anglos report significantly more psychiatric symptoms, especially those of one factor grouping named "anxiety," and they report more recent experiences with both positive and negative affect than do Mexican-Americans and Blacks. The elderly persons "well enough" to participate in a long interview express no significant increase in symptomatology compared with younger groups. If the symptom expression is broken into several categories based on factor analysis, we find a small, significant increase in symptom expression by older groups on the factor grouping named "depression." Additionally, the older groups compared with middle-aged and younger groups, report less positive and negative affect expression.     

Prevalence of Parent-Reported ASD and ADHD in the UK: Findings from the Millennium Cohort Study

The UK prevalence of parent-reported autism spectrum disorder (ASD) and attention deficit/hyperactivity disorder (ADHD) were estimated from the Millennium Cohort Study. Case definition was if a doctor or health care professional had ever told parents that their child had ASD and/or ADHD. Data were collected in 2008/2009 for 14,043 children. 1.7 % of children were reported as having ASD (95 % CI 1.4–2.0) at mean age 7.2 years (SD = 0.2; range = 6.3–8.2). 1.4 % reportedly had ADHD (95 % CI 1.2–1.7), and 0.3 % had both ASD and ADHD (95 % CI 0.2–0.5). After adjusting for socio-economic disadvantage, only male sex (p < 0.001 for both conditions) and cognitive ability, p = 0.004 (ASD); p = 0.01 (ADHD) remained strongly associated. The observed prevalence of parent-reported ASD is high compared to earlier UK and US estimates. Parent-reported ADHD is low compared to US estimates using the same measure.     

Explaining ethnic variations in adolescent mental health: a secondary analysis of the Millennium Cohort Study

Purpose

The relationship between ethnicity and adolescent mental health was investigated using cross-sectional data from the nationally representative UK Millennium Cohort Study.

Methods

Parental Strengths and Difficulties Questionnaire reports identified mental health problems in 10,357 young people aged 14 (n = 2042 from ethnic minority backgrounds: Mixed n = 492, Indian n = 275, Pakistani n = 496, Bangladeshi n = 221, Black Caribbean n = 102, Black African n = 187, Other Ethnic Group n = 269). Univariable logistic regression models investigated associations between each factor and outcome; a bivariable model investigated whether household income explained differences by ethnicity, and a multivariable model additionally adjusted for factors of social support (self-assessed support, parental relationship), participation (socialising, organised activities, religious attendance), and adversity (bullying, victimisation, substance use). Results were stratified by sex as evidence of a sex/ethnicity interaction was found (P = 0.0002).

Results

There were lower unadjusted odds for mental health problems in boys from Black African (OR 0.15, 95% CI 0.04–0.61) and Indian backgrounds (OR 0.42, 95% CI 0.21–0.86) compared to White peers. After adjustment for income, odds were lower in boys from Black African (OR 0.10, 95% CI 0.02–0.38), Indian (OR 0.40, 95% CI 0.21–0.77), and Pakistani (OR 0.49, 95% CI 0.27–0.89) backgrounds, and girls from Bangladeshi (OR 0.18, 95% CI 0.05–0.65) and Pakistani (OR 0.63, 95% CI 0.41–0.99) backgrounds. After further adjustment for social support, participation, and adversity factors, only boys from a Black African background had lower odds (OR 0.16, 95% CI 0.03–0.71) of mental health problems.

Conclusions

Household income confounded lower prevalence of mental health problems in some young people from Pakistani and Bangladeshi backgrounds; findings suggest ethnic differences are partly but not fully accounted for by income, social support, participation, and adversity. Addressing income inequalities and socially focused interventions may protect against mental health problems irrespective of ethnicity.

     

Early developmental milestones in adult schizophrenia and other psychoses. A 31-year follow-up of the Northern Finland 1966 Birth Cohort

Delayed childhood development may precede adult psychoses. We tested this hypothesis in a large, general population birth cohort (n=12058) followed to age 31 years. The ages at which individuals learned to stand, walk, speak, and became potty-trained (bowel control) and dry (bladder control), were recorded at a 1-year examination. Psychiatric outcome was ascertained through linkage to a national hospital discharge register. Cumulative incidence of DSM-III-R schizophrenia, other psychoses and non-psychotic disorders were stratified according to the timing of milestones and compared within the cohort using internal standardization. 100 cases of DSM-III-R schizophrenia, 55 other psychoses, and 315 non-psychotic disorders were identified. The ages at learning to stand, walk and become potty-trained were each related to subsequent incidence of schizophrenia and other psychoses. Compared with the whole cohort, earlier milestones reduced, and later milestones increased, the risk in a linear manner. These developmental effects were not seen for non-psychotic outcomes. The findings support hypotheses regarding psychosis as having a developmental dimension with precursors apparent in early life.     

Intraventricular hemorrhage and developmental outcomes at 24 months of age in extremely preterm infants

Whether intraventricular hemorrhage increases the risk of adverse developmental outcome among premature infants is controversial. Using brain ultrasound, we identified intraventricular hemorrhage and white matter abnormalities among 1064 infants born before 28 weeks' gestation. We identified adverse developmental outcomes at 24 months of age using a standardized neurologic examination and the Bayley Scales of Infant Development Mental and Motor Scales. In logistic regression models that adjusted for gestational age, sex, and public insurance, isolated intraventricular hemorrhage was associated with visual fixation difficulty but no other adverse outcome. Infants who had a white matter lesion unaccompanied by intraventricular hemorrhage were at increased risk of cerebral palsy, low Mental and Motor Scores, and visual and hearing impairments. Except when accompanied or followed by a white matter lesion, intraventricular hemorrhage is associated with no more than a modest increase (and possibly no increase) in the risk of adverse developmental outcome during infancy.     

Children with developmental language delay at 24 months of age: results of a diagnostic work-up

The aim of this study was to evaluate if a diagnostic work-up should be recommended for 2-year-old children with developmental language delay (LD), or if the widely chosen 'wait and see' strategy is adequate. Children with LD were identified in paediatric practices during routine developmental check-ups using a German parent-report screening questionnaire (adapted from the MacArthur Communicative Development Inventories). A standardized German instrument and the Netherlands version of Bayley Scales of Infant Development (2nd ed.) were used to assess language ability and nonverbal cognitive development respectively in 100 children with LD (65 males, 35 females; mean age 24.7 mo [SD 0.9]) and a control group of 53 children with normal language development (33 males, 20 females; mean age 24.6 mo [SD 0.8]). Neurological and audiometric testing were also performed. Sixty-one per cent of the LD group had specific expressive LD and 17% specific receptive-expressive LD. In 22%, LD was associated with other neurodevelopmental problems, 6% showed significant deficits in nonverbal cognitive abilities, and in 12%, nonverbal cognitive abilities were borderline. Four per cent fulfilled the criteria of childhood autism. LD at 2 years proved to represent a sensitive marker for different developmental problems. Adequate early intervention requires a clear distinction between specific expressive or receptive-expressive LD and LD associated with other neurodevelopmental problems. Though catch-up development is to be expected in a substantial proportion of 'late talkers', our data demonstrate that a general 'wait and see' approach is not justified in young children with LD. A proposal for a rational diagnostic work-up is presented.     

Balance control: sex and age differences in 9- to 16-year-olds

This study investigated sex and age differences in standing balance. Movement of the centre of pressure (COP) was calculated from ground reaction force data collected from a force platform during bipedal stance with eyes open and eyes closed. Three groups of 60 children, with 30 girls and 30 boys in each, were assessed. Mean ages of each group were as follows: 9 years 11 months (standard deviation [SD] 3mo); 12 years 11 months (SD 2mo); and 15 years 11 months (SD 3mo) respectively. Summary sway parameters and frequency domain variables were calculated in the anteroposterior and mediolateral directions. Boys exhibited greater COP movement than girls at 9 to 10 years of age. Age-related 'improvements' in sway occurred in boys, thus some aspects of postural control are still developing after 9 to 10 years of age. As very little age-related difference was seen in girls, boys may lag behind somewhat in terms of developing postural control. Thus there is a need to study the sexes separately when investigating balance in children.     

The role of developmental assets in predicting academic achievement: a longitudinal study

A sample of 370 students in the 7th-9th grades in 1998 was followed for 3 years through the 10th-12th grades in order to investigate the relation of "developmental assets"--positive relationships, opportunities, skills, values, and self-perceptions--to academic achievement over time, using actual GPA as the key outcome variable. The greater the number of developmental assets students reported in the 7th-9th grades, the higher their GPA in the 10th-12th grades. Students who stayed stable or increased in their asset levels had significantly higher GPAs in 2001 than students whose asset levels decreased. Increases in assets were significantly associated with increases in GPA. Experiencing in 1998 clusters of specific assets increased by 2-3 times the odds of students having a B+ or higher GPA in 2001. The results offer promising evidence that a broad focus on building the developmental nutrients in young people's lives may contribute to academic success.     

Reduced optimality as an indicator of developmental status at 18 months and school achievement at 8 years

Birth records of 97 children assessed at 18 months and found to be developmentally delayed were scored according to the optimality concept developed by Prechtl. These children were compared to a control series of 81 children. In order to evaluate the predictive validity of the parental developmental assessments performed at 18 months the children had been screened for school achievement problems at the age of eight years, yielding a distribution of true and false positives and true and false negatives. Rates of reduced optimality were compared to investigate firstly, the relationship between reduced optimality and developmental delay at 18 months and secondly, whether the follow-up distribution of true and false positives at eight years could be related to reduced optimality. The overall relationship between reduced optimality and developmental delay at 18 months and reduced optimality and school achievement problems at eight years was also investigated. The 15 low scoring cases registered as mentally retarded differed significantly from controls on total mean reduced optimality. Retarded and non-retarded low-scorers differed significantly on post partum sub-scores only. When the eight-year follow-up groups were compared both retarded and non-retarded true positives differed significantly from true negatives on total mean reduced optimality. The difference in post-partum reduced optimality between retarded and all other follow-up groups but non-retarded true positives reached statistical significance.(ABSTRACT TRUNCATED AT 250 WORDS)     

Kainate receptors coming of age: milestones of two decades of research

Two decades have passed since the first report of the cloning of a kainate-type glutamate receptor (KAR) subunit. The intervening years have seen a rapid growth in our understanding of the biophysical properties and function of KARs in the brain. This research has led to an appreciation that KARs play very distinct roles at synapses relative to other members of the glutamate-gated ion channel receptor family, despite structural and functional commonalities. The surprisingly diverse and complex nature of KAR signaling underlies their unique impact upon neuronal networks through their direct and indirect effects on synaptic transmission, and their prominent role in regulating cell excitability. This review pieces together highlights from the two decades of research subsequent to the cloning of the first subunit, and provides an overview of our current understanding of the role of KARs in the CNS and their potential importance to neurological and neuropsychiatric disorders.     

Gender differences in depression and anxiety: The role of age

Although females run greater risk for affective disorders, the greater vulnerability of women for these disorders varies with the age. The present study evaluates the lifetime incidence of depressive and anxiety disorders by age and gender in a community sample (2363 subjects; 54.6% females), representative of the general population (Sesto Fiorentino Study). Lifetime prevalence of affective disorders resulted higher in females. The age–sex pattern for affective disorders was observed only before menopause.     

There is variability in the attainment of developmental milestones in the CDKL5 disorder

Background

Individuals with the CDKL5 disorder have been described as having severely impaired development. A few individuals have been reported having attained more milestones including walking and running. Our aim was to investigate variation in attainment of developmental milestones and associations with underlying genotype.

Methods

Data was sourced from the International CDKL5 Disorder Database, and individuals were included if they had a pathogenic or probably pathogenic CDKL5 mutation and information on early development. Kaplan-Meier time-to-event analyses investigated the occurrence of developmental milestones. Mutations were grouped by their structural/functional consequence, and Cox regression was used to investigate the relationship between genotype and milestone attainment.

Results

The study included 109 females and 18 males. By 5 years of age, only 75% of the females had attained independent sitting and 25% independent walking whilst a quarter of the males could sit independently by 1 year 3 months. Only one boy could walk independently. No clear relationship between mutation group and milestone attainment was present, although females with a late truncating mutation attained the most milestones.

Conclusion

Attainment of developmental milestones is severely impaired in the CDKL5 disorder, with the majority who did attain skills attaining them at a late age. It appears as though males are more severely impaired than the females. Larger studies are needed to further investigate the role of genotype on clinical variability.     

The United Kingdom Infantile Spasms Study (UKISS) comparing hormone treatment with vigabatrin on developmental and epilepsy outcomes to age 14 months: a multicentre randomised trial

BACKGROUND: Infantile spasms is a severe infantile seizure disorder that is difficult to treat and has a high morbidity. Absence of spasms on days 13 and 14 after randomisation is more common in infants allocated hormone treatments than in those allocated vigabatrin. We sought to assess whether early control of spasms is associated with improved developmental or epilepsy outcomes. METHODS: Infants enrolled in the United Kingdom Infantile Spasms Study (UKISS) were randomly assigned hormone treatment (n=55) or vigabatrin (n=52) and were followed up until clinical assessment at 12-14 months of age. We assessed neurodevelopment with the Vineland adaptive behaviour scales (VABS) at 14 months of age on an intention to treat basis. FINDINGS: Of 107 infants enrolled, five died and 101 survivors reached both follow-up assessments. Absence of spasms at final clinical assessment (hormone 41/55 [75%] vs vigabatrin 39/51 [76%]) was similar in each treatment group (difference 1.9%, 95% CI -18.3% to 14.4%; chi(2)=0.05; p=0.82). Mean VABS score did not differ significantly (hormone 78.6 [SD 16.8] vs vigabatrin 77.5 [SD 12.7]; difference 1.0, 95% CI -4.9 to 7.0; t(99)=0.35, p=0.73). In infants with no identified underlying aetiology, the mean VABS score was higher in those allocated hormone treatment than in those allocated vigabatrin (88.2 [17.3] vs 78.9 [14.3]; difference 9.3, 95% CI 1.2 to 17.3; t(95)=2.28, p=0.025). INTERPRETATION: Hormone treatment controls spasms better than does vigabatrin initially, but not at 12-14 months of age. Better initial control of spasms by hormone treatment in those with no identified underlying aetiology may lead to improved developmental outcome.