A new study suggests that children who need to be 5 years old by 1 September to attend kindergarten that year ̵
SALT LAKE CITY – A new study suggests that children born in August are more likely to have ADHD in countries where children need to be 5 years old to start kindergarten by 1 September Diagnosis received.  What's going on: Researchers in the new study found that more diagnoses were made among children born in August, especially in the states where September 1 ends for the start of kindergarten. reports CNN.
- Born children would be the youngest in their class, the study finds.
- "From August to September, we did not see anything between August and September where we saw this big difference," said Timothy Layton, Assistant Professor of Health Policy at Harvard Medical School, who was the lead author of the study. "We saw that this was only the case in states that cut on September 1. There was nothing in states that did not have that."
Why it matters: Children are overdiagnosed and over-treated for ADHD because they are relatively immature compared to their older classmates in their first years of primary school, "Layton said, according to the Science Daily.
Method: The study looked at more than 407,000 US children born between 2007 and 2009. Researchers tracked the diagnoses using an insurance database.
Special features: The rate for ADHD diagnoses was higher in children with 34 percent August birthdays compared to those with birthdays in September (CNN reports).
States: The study found that there are 21 states as of the deadline including Arizona, Texas and Illinois Ion of the States.
Other states have different enrollment dates, including Dec. 2 in California and Jan. 1 for Ve rmont.
The report lists Utah's deadline as September 2.
Enlarge image: ] Doctors should be alerted to these findings to avoid over-diagnosis, the researchers wrote for the New York Times.