Breaking News
March 22, 2019 - Alzheimer’s patients using antiepileptic drugs have twice the risk of pneumonia, study shows
March 22, 2019 - Skin diseases may be more prevalent than previously thought
March 22, 2019 - Overall rates of death from breast cancer are falling across the EU
March 22, 2019 - Novel plasmid could hold key to control of mosquito-borne illness
March 22, 2019 - Female Emergency Physicians Paid Less Than Males
March 22, 2019 - Estimated average glucose (eAG): MedlinePlus Medical Encyclopedia
March 22, 2019 - Experimental drug could be new option for type 2 diabetes
March 22, 2019 - Five Things To Know About The Electronic Health Records Mess
March 22, 2019 - TMJ disorders could be treated with tissue-engineered implants after successful animal study
March 22, 2019 - Team-based approach is key to successful care of pregnant women with heart failure
March 22, 2019 - Study identifies gene variant associated with accelerated cellular aging
March 21, 2019 - Salk scientists show how background noise from neurons can interrupt focused attention
March 21, 2019 - New class of drugs could help treat patients diagnosed with ovarian cancer
March 21, 2019 - Tecentriq Approved for Small Cell Lung Cancer
March 21, 2019 - Adipocyte glucocorticoid receptors play a role in developing steroid diabetes
March 21, 2019 - Climate change can affect nutrient content of crops, harming human health
March 21, 2019 - Podcast: KHN’s ‘What The Health’ Surprise! Fixing Surprise Medical Bills Is Harder Than it Looks
March 21, 2019 - Chemistry researchers patent new method for making anti-leukemia compounds
March 21, 2019 - UIC scientists identify hidden proteins in bacteria
March 21, 2019 - New Australian drug trial achieves remarkable results in patients with acute myeloid leukemia
March 21, 2019 - Females live longer when they have help raising offspring
March 21, 2019 - How did orthodontists sell orthodontics?
March 21, 2019 - In the Spotlight: From dietitian to physician assistant student
March 21, 2019 - The CRISPR Revolution: What You Need to Know
March 21, 2019 - FDA Chief Calls For Stricter Scrutiny Of Electronic Health Records
March 21, 2019 - Combined glucocorticoid and antioxidant therapy could benefit premature babies
March 21, 2019 - Low levels of certain eye proteins could serve as predictor for Alzheimer’s
March 21, 2019 - Post-traumatic holocaust survivors transmit negative views on aging to offspring
March 21, 2019 - City of Hope receives $7.5 million in grant awards to study cutaneous T cell lymphoma
March 21, 2019 - New video game-led training device helps stroke survivors regain arm mobility
March 21, 2019 - Compounds in coffee could slow prostate cancer growth
March 21, 2019 - New mobile DNA element in Wolbachia may contribute to improved disease control strategies
March 21, 2019 - Phase 2 Clinical Trial of Bermekimab Shows Potential New Standard of Care for Treatment of Hidradenitis Suppurativa, Including Significant Pain Reduction without Antibiotics
March 21, 2019 - More than one-third of patients risk major bleeding by doubling up on blood thinners
March 21, 2019 - A skeptical look at popular diets: Thumbs up for Mediterranean
March 21, 2019 - PTSD After Cardiac Arrest Predicts More Heart Trouble
March 21, 2019 - Role of immunological imprinting in elicitation of new antibodies
March 21, 2019 - Breast cancer relapse predictor tool may soon be a reality
March 21, 2019 - New computer program developed by TGen lights up cancer-causing genetic mutations
March 21, 2019 - FDA warns two breast implant makers for failure to comply with post-approval study requirements
March 21, 2019 - Butler Hospital receives COBRE grant to enhance research on neuropsychiatric illnesses
March 21, 2019 - Majority of osteoporosis clinical practice guidelines ignore patients’ voices
March 21, 2019 - Generic messages don’t help patients to lose weight
March 21, 2019 - Eisai and Imbrium Therapeutics Announce U.S. FDA Filing Acceptance of New Drug Application for Lemborexant for the Treatment of Insomnia
March 21, 2019 - Two-drug combos using popular calcium channel blocker show superiority in lowering BP
March 21, 2019 - First-in-human pilot study shows positive results for ‘bacteria-phobic’ catheter
March 21, 2019 - Itamar Medical launches next-generation WatchPAT system for home sleep apnea testing
March 21, 2019 - Study estimates health and economic impacts of healthy food prescriptions
March 21, 2019 - Detecting fungal disease in crops with multispectral imaging system
March 21, 2019 - MIT announces creation of the Alana Down Syndrome Center
March 21, 2019 - Next-generation LVAD device clinically superior, safer for heart failure patients
March 21, 2019 - Allergan Announces FDA Approval of Avycaz (ceftazidime and avibactam) for Pediatric Patients
March 21, 2019 - Mutations in noncoding genes could play big role in regulating cancer, study finds
March 21, 2019 - A medical student’s thoughts on Match Day
March 21, 2019 - Are eggs good or bad for you?
March 21, 2019 - New analysis reveals precision oncology insights for colorectal cancer
March 21, 2019 - Pollutants appear to weaken immune system and increase pathogen virulence
March 21, 2019 - Researchers develop and validate scale for rating severity of mononucleosis
March 21, 2019 - Scientists identify generation of key immune response in mice on introducing solid food
March 21, 2019 - New nanomaterial could restore internal structure of damaged bones
March 21, 2019 - Selective destruction of prostate tumor as effective as complete prostate removal
March 21, 2019 - 2011 to 2015 Saw Increase in Psychiatric ED Visits for Youth
March 21, 2019 - Tapeworm drug targets common vulnerability in tumor cells
March 21, 2019 - WVU researcher discovers higher suicide rate among Medicaid-insured youth
March 21, 2019 - Off the beaten path for global health residency
March 21, 2019 - European Parliament’s report calls on EU to develop policies to regulate endocrine-disrupting chemicals
March 21, 2019 - Women with undiagnosed diabetes in pregnancy more likely to experience stillbirths
March 21, 2019 - Fish consumption can help prevent asthma, study reveals
March 21, 2019 - Royal Holloway professors to lead new to research into curing Neurofibromatosis type 1
March 21, 2019 - NSF offers grant to improve treatment approaches for pelvic organ prolapse
March 21, 2019 - Your Apple Watch Might Help Spot a Dangerous Irregular Heartbeat
March 21, 2019 - Research team uncovers critical new clues about what goes awry in autistic brains
March 21, 2019 - From March Madness to medicine with help from mentors
March 21, 2019 - Mental health disorders among young adults may be on the increase
March 21, 2019 - New study examines smarter automatic defibrillator
March 21, 2019 - UC Riverside research shows how natural selection favors cheaters
March 21, 2019 - Mother’s diet during pregnancy can impact lung-specific genes of her offspring
March 21, 2019 - AeroForm Tissue Expanders makes breast reconstruction after mastectomy more comfortable
March 21, 2019 - New project focuses on creating more responsive, intuitive prosthetics
March 21, 2019 - New case study describes adolescent patient with rapid-onset schizophrenia and Bartonella infection
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