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Study: Fussy Babies Linked to ADHD Risk

Researchers Say Excessive Crying, Sleeping Problems in Infants May Be Linked to Behavioral Problems
WebMD Health News
Reviewed by Laura J. Martin, MD

April 20, 2011 -- Babies who cry excessively and have difficulty sleeping and feeding may be at increased risk for behavioral problems during childhood, including attention deficit hyperactivity disorder (ADHD), a study shows.

Close to 20% of all babies show signs of “regulatory issues” such as persistent crying, sleeping issues, and feeding problems during the first year of life. Most of the time these symptoms are transient and infants adjust by the time they reach preschool.

But “those with persistent regulatory problems in families with other problems may require early interventions to minimize or prevent the long-term consequences of infant regulatory problems,” concludes study researcher Mirja Helen Hemmi of the University of Basel, Switzerland.

The new findings appear online in the Archives of Disease in Childhood.

Researchers analyzed 22 studies that looked at infant regulatory problems in 1,935 children. Ten of these studies looked at the consequences of excessive crying, four looked at sleeping problems, three concerned infant feeding issues, and five studies focused on babies with multiple regulatory issues.

Risk of behavioral problems was highest among infants who experienced problems in several categories. Most commonly, these problems were linked to ADHD and externalizing behavioral issues such as aggressive or destructive behavior and/or temper tantrums. ADHD is a behavioral disorder marked by impulsiveness, hyperactivity, and inattention.

Those who were at greatest risk for behavioral problems as children were also more likely to be from troubled families, including those with psychosocial problems and problems interacting with each other.

What Is ‘Excessive’ Crying?

All babies cry, and it can be difficult to soothe them at times. Excessive crying refers to intense, unsoothable bouts of crying for no apparent reason in the first three months of life. Babies with sleeping difficulty have trouble settling in at bedtime and don’t sleep through the night without interruption. In the study, feeding issues were characterized as vomiting, food refusal, little appetite, and/or swallowing problems.

It used to be that fussy babies were called “colicky,” says Penny Glass, PhD, a developmental psychologist at the Children's National Medical Center in Washington, D.C. “Now what used to be accepted as colic is often diagnosed as mild reflux symptoms and treated,” she says. “A lot of babies who spend a lot of time being irritable respond quickly to these treatments.”

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