Study points to jaundice link with autism
Source: Agencies |
October 12, 2010, Tuesday
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AUTISM is more common in children who had jaundice at birth, a Danish study has found, but researchers cautioned they don't know how the two conditions might be related and that new parents shouldn't be alarmed.
Mild jaundice is fairly common and generally harmless. Severe, untreated jaundice is known to cause brain damage, but it's also rare and hasn't been proven to cause autism. It's possible that children genetically predisposed to autism might also be more vulnerable than others to jaundice.
But if autism and jaundice are related, the study doesn't answer whether one of the ailments might have caused the other, said Rikke Damkjaer Maimburg, the lead author and a researcher at Denmark's Aarhus University.
Maimburg and colleagues examined data on all 733,826 children born in Denmark between 1994 and 2004.
More than 35,000 newborns had jaundice, while autism was eventually diagnosed in 577 children. Among autistic children, almost 9 percent had jaundice as newborns, compared with 3 percent of other children.
Previous studies on a possible autism-jaundice link have produced conflicting results.
The new results shouldn't scare parents whose newborns are jaundiced, said Dr Thomas Newman, a pediatrician and epidemiologist at the University of California at San Francisco who studied the same topic and found no link.
Mild jaundice can cause a yellowish-orange tinge to the skin and simply signals that newborns' livers aren't fully mature.
Newborns are typically examined for jaundice before leaving the hospital, and it usually disappears within a week or two without treatment.
Mild jaundice is fairly common and generally harmless. Severe, untreated jaundice is known to cause brain damage, but it's also rare and hasn't been proven to cause autism. It's possible that children genetically predisposed to autism might also be more vulnerable than others to jaundice.
But if autism and jaundice are related, the study doesn't answer whether one of the ailments might have caused the other, said Rikke Damkjaer Maimburg, the lead author and a researcher at Denmark's Aarhus University.
Maimburg and colleagues examined data on all 733,826 children born in Denmark between 1994 and 2004.
More than 35,000 newborns had jaundice, while autism was eventually diagnosed in 577 children. Among autistic children, almost 9 percent had jaundice as newborns, compared with 3 percent of other children.
Previous studies on a possible autism-jaundice link have produced conflicting results.
The new results shouldn't scare parents whose newborns are jaundiced, said Dr Thomas Newman, a pediatrician and epidemiologist at the University of California at San Francisco who studied the same topic and found no link.
Mild jaundice can cause a yellowish-orange tinge to the skin and simply signals that newborns' livers aren't fully mature.
Newborns are typically examined for jaundice before leaving the hospital, and it usually disappears within a week or two without treatment.
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