Breaking News
November 12, 2018 - Optibrium and University of Nottingham Collaborate on Innovative Teaching Programme
November 12, 2018 - RNA defects linked to multiple myeloma progression in high risk patients
November 12, 2018 - Science is on trial – and we need doctors to provide the defense
November 12, 2018 - Salk researchers receive $19.2 million to unravel mysteries of age-related cognitive decline
November 12, 2018 - KE Eye Centers offer new solution for patients with myopia and astigmatism
November 12, 2018 - Trumpeted new Medicare Advantage benefits will be hard for seniors to find
November 12, 2018 - Biogen and Eisai Announce Presentation of Detailed Analyses from the Phase 1b Long-Term Extension Study of Aducanumab at Clinical Trials on Alzheimer’s Disease (CTAD)
November 12, 2018 - Scientists reveal new cystic fibrosis treatments work best in inflamed airways
November 12, 2018 - Testing coronary calcium levels can better predict patient’s risk for coronary heart disease
November 12, 2018 - FDA conducts mass seizure of food and medical products held under insanitary conditions
November 12, 2018 - FDA Approves Invokana (canagliflozin) to Reduce the Risk of Heart Attack, Stroke or Cardiovascular Death in Adults with Type 2 Diabetes and Established Cardiovascular Disease
November 12, 2018 - Hormone helps reverse brain damage caused by obesity
November 12, 2018 - Grants aim to provide better cancer clinical trial access for military veterans
November 12, 2018 - Mitochondrial DNA may have strong influence on cellular metabolism and disease susceptibility
November 12, 2018 - High stakes, entrenched interests and the Trump rollback of environmental regs
November 12, 2018 - Stem cells transplanted for treatment of Parkinson’s disease
November 12, 2018 - Sandoz Inc. Issues Voluntary Nationwide Recall of One Lot of Losartan Potassium and Hydrochlorothiazide Due to the Detection of Trace Amounts of NDEA (N-Nitrosodiethylamine) Impurity Found in the Active Pharmaceutical Ingredient (API)
November 12, 2018 - Protein found in patients with severe asthma can help identify who would benefit from targeted drugs
November 12, 2018 - Experts develop a list of competencies in antimicrobial prescribing and stewardship
November 12, 2018 - Allied BioScience receives approved label from EPA for new bacteriostatic surface coating
November 12, 2018 - MR Solutions displays elegant bench top CT scanner with clip-on PET and SPECT at EANM congress
November 12, 2018 - FDA announces emergency use authorization of Ebola fingerstick test with portable reader
November 12, 2018 - Grieving spouses with sleep problems have increased risk of chronic immune activation
November 12, 2018 - Exercise routines affect mental health in Japanese expatriates
November 12, 2018 - Fish oil and vitamin D pills no guard against cancer or serious heart trouble
November 12, 2018 - Excess Gestational Weight Gain Not Better for Child Bone Health
November 12, 2018 - Immune receptor provides protective immunity against Group A Streptococcus
November 12, 2018 - Scientists develop new method to produce irradiated nanomaterials for medical applications
November 12, 2018 - Blue light exposure decreases blood pressure
November 12, 2018 - Researchers discover two proteins essential for development of skeletal muscle
November 12, 2018 - Yelp reviews help understand strengths, weaknesses of emergency departments and urgent care centers
November 12, 2018 - Adolescent obesity linked with increased risk of pancreatic cancer later in life
November 12, 2018 - AHA: Poor Teeth-Brushing Habits Tied to Higher Heart Risk
November 12, 2018 - Researchers find how natural killer cells regulate protective HIV antibodies
November 12, 2018 - Rutgers receives $4.2 million federal grant to improve mental health services
November 12, 2018 - Sussex scientists develop a piece of hardware to show how brains function
November 12, 2018 - Study shows pivotal role of parents in efforts to change sexual orientation of LGBT teens
November 12, 2018 - Neck scan detects dementia way before symptoms appear
November 12, 2018 - Risk-profiling can benefit HIV prevention
November 12, 2018 - New thrombolytic based on magnetite nanoparticles successfully tested on animals
November 12, 2018 - Smoking rates go down in the US, lowest since 1965
November 12, 2018 - Phase III Trial of Darolutamide in Patients with Non-metastatic Castration-resistant Prostate Cancer Meets Primary Endpoint
November 12, 2018 - Moderate exercise before conception resulted in lower body weight, increased insulin sensitivity of offspring
November 11, 2018 - Community choirs for older adults reduce loneliness and increase interest in life
November 11, 2018 - Trevena Receives Complete Response Letter for Oliceridine from FDA
November 11, 2018 - More adults and children are using yoga and meditation
November 11, 2018 - Female smokers at greater risk of heart attacks, finds study
November 11, 2018 - Happy Childhood Memories Associated With Better Health
November 11, 2018 - X-linked infantile spinal muscular atrophy – Genetics Home Reference
November 11, 2018 - RNA thought to spread cancer shows ability to suppress breast cancer metastasis
November 11, 2018 - Study finds that thymus plays key role during normal pregnancy
November 11, 2018 - Exploring why some athletes ice their muscles after exercise
November 11, 2018 - Female Genital Mutilation Decreasing in African Nations
November 11, 2018 - Are humans immune to the CRISPR-Cas9 gene editing scissors?
November 11, 2018 - Breastmilk and saliva mixtures regulate oral microbiome of newborn babies
November 11, 2018 - Learning familiar faces through social interactions reduces variability in face recognition
November 11, 2018 - New open source decision support tool could help clinicians chose chemotherapy drugs
November 11, 2018 - New weapons drawn in global TB fight
November 11, 2018 - UCB and Biogen Announce Topline Results from a Phase 2b Study of Dapirolizumab Pegol in Systemic Lupus Erythematosus
November 11, 2018 - Surgery restores boy’s ability to walk post-acute flaccid myelitis
November 11, 2018 - Comorbidity negatively impacts quality of life in people with dementia
November 11, 2018 - Neuroscientists receive $16.75 million from BRAIN Initiative to decipher the brain’s visual system
November 11, 2018 - Purdue researchers invent new smart drainage device to help glaucoma patients
November 11, 2018 - New initiative may benefit entrepreneurs working to transform patient care
November 11, 2018 - Sage Therapeutics Announces FDA Advisory Committee Votes 17-1 in Support of Benefit-Risk Profile of Zulresso (brexanolone) Injection for Treatment of Postpartum Depression
November 11, 2018 - Exercise could delay progression of type 1 diabetes when first diagnosed
November 11, 2018 - Study of gaze fixation in monkeys reveals role of dopamine neurons in response inhibition
November 11, 2018 - Bilingual therapy is vital to improve language disorders in dual-language children, finds study
November 11, 2018 - More Frequent Surveillance No Benefit After NSCLC Resection
November 11, 2018 - Phenylketonuria (PKU) Screening: MedlinePlus Lab Test Information
November 11, 2018 - Researchers discovered a new mechanism of action in a first-line drug for diabetes
November 11, 2018 - Study explains how dermal fibroblasts age
November 11, 2018 - New multi-allergen test works just as well with dried blood
November 11, 2018 - CWRH/UH researcher receives grant to study role of KLF2 factor in vascular-related disorders
November 11, 2018 - New infrared detector may transform smartphones into pocket-sized portable labs
November 11, 2018 - AHA: Young Golfer Returns to Sport He Loves After Stroke
November 11, 2018 - Yuan-Harel-Lupski syndrome – Genetics Home Reference
November 11, 2018 - Effective diagnosis of persistent facial pain will benefit patients and save money
November 11, 2018 - Loyola tests new catheter ablation system that can reach deeper into heart muscle
November 11, 2018 - Pilates exercise program offers many benefits for people with musculoskeletal conditions
Global study finds youngest in class more likely to be diagnosed with ADHD

Global study finds youngest in class more likely to be diagnosed with ADHD

image_pdfDownload PDFimage_print
Children with ADHD find it more difficult to focus and to complete their schoolwork. Credit: public domain image

A new global study involving the University of Adelaide has found that children who are the youngest in their classroom are more likely to be diagnosed with Attention Deficit Hyperactivity Disorder (ADHD) than their older classmates.

The research, led by Curtin University and published in the Journal of Child Psychology and Psychiatry, systematically reviewed studies that examine the relationship between a child’s age relative to their classmates and their chances of being diagnosed with, or medicated for, ADHD.

Seventeen studies covering more than 14 million children – five in the USA, two in Spain and one each in Canada, Finland, Germany, the Netherlands, Iceland, Israel, Norway, Sweden, Taiwan and Australia – found it was more common for the youngest children in a classroom to be diagnosed with ADHD and medicated.

Co-author Professor Jon Jureidini, a Child and Adolescent Psychiatrist from the University of Adelaide, said the findings highlighted the importance of teachers, doctors and parents being aware of the impact of relative age and giving the youngest children in class the extra time they need to mature.

“Mistaking perfectly normal age-related immaturity for ADHD is just one of many problems with the label. Children who are sleep deprived, bullied, have suffered abuse or have a host of other problems, often get labelled ADHD,” Professor Jureidini said.

“Not only does this result in them getting potentially harmful drugs they don’t need, but their real problems don’t get identified and addressed.”

Lead author Dr. Martin Whitely, Research Fellow at the John Curtin Institute of Public Policy based at Curtin University, said there are no biological markers or physical tests for ADHD and the diagnosis is based in large part on teacher reports of a child’s behaviour.

“It appears that across the globe some teachers are mistaking the immaturity of the youngest children in their class for ADHD. Although teachers don’t diagnose it, they are often the first to suggest a child may have ADHD,” Dr. Whitely said.

“Our research shows that the ADHD late-birthday effect occurs in both high prescribing countries, like the USA, Canada and Iceland, and in countries where ADHD is far less common, like Finland, Sweden and Taiwan. Our findings challenge the notion that misdiagnosis only happens in countries where there is a high rate of prescriptions for ADHD.”

Dr. Whitely explained that only two studies, both in Denmark, demonstrated a weak or non-existent late birth-date effect, with the majority of late-born Danish boys held back a year, which makes it unclear whether this prevents or just disguises the effect.

“Further research could help us determine whether allowing parents to decide if their child is ready to begin school helps reduce this and other late birthday effects. It could be that it helps the delayed-entry child but other children suffer,” Dr. Whitely said.


Explore further:
ADHD or just immature?

More information:
Martin Whitely et al. Attention deficit hyperactivity disorder late birthdate effect common in both high and low prescribing international jurisdictions: systematic review, Journal of Child Psychology and Psychiatry (2018). DOI: 10.1111/jcpp.12991

Journal reference:
Journal of Child Psychology and Psychiatry

Provided by:
University of Adelaide

Tagged with:

About author

Related Articles