Breaking News
January 17, 2019 - Educational videos in clinical settings increase HPV vaccination rates among adolescents
January 17, 2019 - Better understanding of aggressive brain tumour
January 17, 2019 - Why is life expectancy in the U.S. going down? A Q&A
January 17, 2019 - The Electronics Industry Sees Money In Your Health
January 17, 2019 - Hypertension drug may improve effectiveness of ovarian cancer treatment
January 17, 2019 - Scientists reveal key mechanism in worms that controls cell’s response to stress
January 17, 2019 - How Patch Clamp Technology Can Benefit Ion Channel Research
January 16, 2019 - Researchers cultivate organoids that perfectly mimic blood vessels
January 16, 2019 - Sound Pharmaceuticals Advances Phase 2 Hearing Loss Clinical Trial in Cystic Fibrosis
January 16, 2019 - Unraveling the genetic causes of skin cancer
January 16, 2019 - Higher percentages of saturated fat in low-carb diets may not harm cholesterol levels, new analysis suggests
January 16, 2019 - Using bottled or tap water impacts health benefits of green tea
January 16, 2019 - Best trained alert dogs have potential to improve Type 1 diabetes patients’ quality of life
January 16, 2019 - States with lower incidence of melanoma have higher mortality rates
January 16, 2019 - Pollution on the London Underground found to be dangerously high
January 16, 2019 - Breast cancer cells in mice coaxed to turn into harmless fat cells
January 16, 2019 - Study connects the genetic background of autistic spectrum disorders with stem cell dysfunction
January 16, 2019 - When activated, ‘social’ brain circuits inhibit feeding behavior in mice | News Center
January 16, 2019 - How Exercise May Help Keep Our Memory Sharp
January 16, 2019 - Researchers identify a key regulator that stops excessive inflammation
January 16, 2019 - TGF-beta signaling pathway in uterine cells protects against cancer
January 16, 2019 - MD Anderson Cancer Center collaborates with Dragonfly for new immunotherapy drug clinical trials
January 16, 2019 - Drug Repurposing May Provide More Psychiatric Tx Options
January 16, 2019 - A new brain imaging study challenges the dominant theoretical model of autism spectrum disorders
January 16, 2019 - GoFundMe CEO: ‘Gigantic Gaps’ In Health System Showing Up In Crowdfunding
January 16, 2019 - Induced neuronal cells derived from fibroblasts are similar to neurons in the brain
January 16, 2019 - New study finds link between childhood abuse and suicide in later life
January 16, 2019 - Lifestyle and health factors that are good for the heart can also prevent diabetes
January 16, 2019 - Scientists take another step in understanding bacteria that cause Salmonella epidemic
January 16, 2019 - Look to Your Aunts, Uncles and Parents for Clues to Your Longevity
January 16, 2019 - Study finds ADHD drugs are unlikely to cause cardiac damage in children who take them
January 16, 2019 - Call The Midwife! (If The Doctor Doesn’t Object)
January 16, 2019 - Changes in hippocampal structural connectivity differentiate responders of electroconvulsive therapy
January 16, 2019 - Study sheds light on the deadly venom of Mojave rattlesnakes
January 16, 2019 - University of Nebraska to develop new drugs that prevent and counteract effects of radiation exposure
January 16, 2019 - Sugar-based stent makes precarious sewing process easier
January 16, 2019 - FDA-approved drug hampers cancer metastasis in animal model, shows study
January 16, 2019 - Low-level cannabis use can change the adolescent brain
January 16, 2019 - MTC in Rouen acquires Robocath’s R-One robot for future healthcare practitioner training
January 16, 2019 - OSSIO granted FDA 510(k) market clearance for OSSIOfiber Bone Pin Family
January 16, 2019 - Childhood body composition may play a role in future respiratory health
January 16, 2019 - Outdated commissioning methods are failing mental health services in the UK, reveals report
January 16, 2019 - Unconventional immune cells trigger disturbed cytokine production in human spondyloarthritis
January 16, 2019 - Patients Turn To GoFundMe When Money And Hope Run Out
January 16, 2019 - Researchers develop novel viral identification method
January 16, 2019 - Study proposes improvements in pharmacological study of cognitive function enhancers in schizophrenia
January 16, 2019 - Study points to potential new biomarker and drug target for amyotrophic lateral sclerosis
January 16, 2019 - Differences in geographic origin of genes may affect mitochondrial function
January 16, 2019 - Study analyzes vaccine-preventable infections in children who receive solid organ transplants
January 16, 2019 - MiRagen Announces New Clinical Data in Patients With Three Different Types of Blood Cancers Treated With Cobomarsen
January 16, 2019 - Scientists uncover why knee joint injury leads to osteoarthritis
January 16, 2019 - Salk team uses new model to study health effects of AMP-activated protein kinase
January 16, 2019 - Research reveals novel approach to suppressing chemotherapy-induced tumor growth
January 16, 2019 - Researchers reveal how fasting leads to better overall health
January 16, 2019 - Deprivation and neglect in early childhood have impact on cognitive functioning in adolescence, shows study
January 16, 2019 - Training Students to use Imaging Techniques: NMR and EPR
January 16, 2019 - Nerve transfer surgery restores arm movement in children with acute flaccid myelitis
January 16, 2019 - Exelixis Announces U.S. FDA Approval of Cabometyx (cabozantinib) Tablets for Previously Treated Hepatocellular Carcinoma
January 16, 2019 - DNA vaccine reduces both toxic proteins linked to Alzheimer’s
January 16, 2019 - Even in the U.S., poor women often can't afford tampons, pads
January 16, 2019 - One time use of Marijuana could affect teen brains finds study
January 16, 2019 - Persistent Opioid Use High in Head, Neck Cancer Patients
January 16, 2019 - Questions to ask your doctor about post pregnancy care: MedlinePlus Medical Encyclopedia
January 16, 2019 - Neurons with good housekeeping are protected from Alzheimer’s
January 16, 2019 - Is mindfulness worthy of all the hype?
January 16, 2019 - Physical Activity, Any Type or Amount, Cuts Health Risk from Sitting
January 16, 2019 - New understanding in the evolution of human feet
January 15, 2019 - AHA: New Cholesterol Guidelines Put Ethnicity in the Spotlight
January 15, 2019 - Different brain areas linked to smoking and drinking
January 15, 2019 - Henry Marsh shares insights into neurosurgery and more at Dean’s Lecture Series
January 15, 2019 - Want to Live Longer? For Just 30 Minutes a Day, Do Anything Else But Sit
January 15, 2019 - The Current issue of “The view from here” is concerned with Targets
January 15, 2019 - Plain packaging sparked tobacco price rises, new study finds
January 15, 2019 - Sedentary lifestyles can be unhealthy, physical activity can lower risk
January 15, 2019 - Gut microbiome may help prevent development of cow’s milk allergy
January 15, 2019 - Lesbian, gay and bisexual individuals more likely to suffer severe substance use disorders
January 15, 2019 - New England Journal of Medicine Publishes Positive Results of the Pivotal Trial of Cablivi (caplacizumab) for Rare Blood Clotting Disorder
January 15, 2019 - Levels of inflammatory marker (CRP) linked to housing type and tenure
January 15, 2019 - Three gifts I’m glad I gave myself in 2018
January 15, 2019 - Columbia’s Pediatrics Department Names New Vice Chairs, Expands Leadership
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