Fussiness in Infancy May Predict Future Behavior Problems, Study Finds

April 21, 2011— -- "He would cry all the time. It was all about him. I couldn't shower, couldn't eat. I lost 15 pounds. I couldn't do anything. My baby was driving me crazy," one mother told workers at the Fussy Baby Network, a support center for parents of infants with crying and sleeping problems.

"Just doing the simplest things, it is just not possible," said another. "I could not get my baby and my dog out the door at the same time. I simply could not do it."

Most parents are familiar with the sleepless nights and the pull-your-hair-out frustration that can come with having a fussy baby. But there might be something more to worry about. Researchers from the U.K. have found that infants with persistent crying, sleeping and eating problems were more likely to have behavioral problems, such as attention deficit hyperactivity disorder, depression, anxiety and aggression, later on.

This doesn't mean that a fussy baby is doomed to a troubled life, only that the warning signs for later problems can appear in the first months of life, pediatricians say.

"I don't suggest that parents worry per se, but I do suggest that they pay very close attention to these important developmental tasks, and interrelational achievements, characteristic of the first year of life," says Dr. Rahil Briggs, director of New York's Montefiore Medical Center's parenting program, Healthy Steps.

"The next step," says says Dieter Wolke, a professor of developmental psychology at the University of Warwick and co-author of the study, "is understanding what is causing this link, [be it] parenting style, genetic predispositions, or some other factor ... and then understanding what kind of interventions might help address this issue before the infant reaches childhood."

Although many babies are fussy in the first few months of life, the cause is often colic, and the tempermental behavior goes away in a few months. Wolke and colleagues studied babies who continue to cry persistently , have disturbed sleep and difficulty feeding beyond these first months. About one in five infants will show signs of these types of behaviors and become easily upset or overstimulated, according to the study, which was published online Wednesday in the Archives of Disease in Childhood,

"It's not that the children cry more often. It's that they can't stop crying. They can't settle themselves. It's an undercontrol problem that makes it difficult for these infants to calm themselves," Wolke says.

Researchers analyzed 22 studies from 1987 to 2006 that looked at the link between this early "undercontrol" and later behavioral problems. They found that infant "control" problems were associated with a higher risk of depression, anxiety, aggression, and ADHD in children under age 9.

Aggression, temper tantrums and ADHD (called externalizing behaviors) were the most likely childhood outcomes among the children studied, and those infants with more than one regulatory problem (sleep problems and crying, for instance) were the most likely to have later behavioral problems.