Hitting, slapping tied to later mental disorders

People who remember being pushed, slapped and hit as children are more likely to be diagnosed with depression, anxiety and personality disorders later in life, a new study suggests.

Canadian researchers estimated between two and seven percent of those mental disorders might be due to punishments inflicted in childhood, not including more severe forms of abuse and maltreatment.

"We know that maltreatment is traumatic, but I think the point here is that even harmful parenting behaviors that may not be classified as maltreatment per se have this association with (mental) disorders," said Lisa Berlin, who studies parenting and child maltreatment at the University of Maryland School of Social Work in Baltimore.

The finding "adds to our existing worries about the use of physical punishment, and speaks to the value of non-physical discipline," Berlin, who wasn't involved in the new study, told Reuters Health. "There just seems to be one study after another... that says we can and should find different ways to discipline our kids."

Up to half of all children may be spanked as punishment, according to researchers led by Tracie Afifi at the University of Manitoba in Winnipeg - but they wanted to look at harsher punishments, such as shoving and hitting.

The study team used data collected by United States Census interviewers in 2004 and 2005 in surveys of close to 35,000 adults across the country.

The interviewers asked participants about how often they were physically punished as children, other problems their families had - such as parents who had drug problems or went to jail - and about their own symptoms of mental disorders, current or past.

Afifi and her colleagues didn't include anyone who reported being physically, sexually or emotionally abused by family members to zone in on the effect of punishment that didn't go so far as to constitute maltreatment.

They found about six percent of interview subjects had been punished beyond spanking "sometimes," "fairly often" or "very often."

And those people with a history of harsh physical punishment were more likely to have a range of mood and personality disorders or to abuse drugs and alcohol.

For example, 20 percent of people who remembered being physically punished had been depressed, and 43 percent had abused alcohol at some point. That compared to 16 percent of people who weren't hit or slapped who had been depressed, and 30 percent who drank too much.

Those links held up after the researchers took into account family problems - including which participants' parents had been treated for mental illness themselves - and interviewees' race, income and level of education.

"People believe that as long as you don't cross that line into child maltreatment, and the physical punishment is controlled and doesn't cross the line into abuse, it won't have any negative long-term consequences for the child," Afifi told Reuters Health.