WEDNESDAY, May 5 (HealthDay News) -- Among twins whose weight differs markedly at birth, the heavier child is more likely to have conduct problems at ages 3 and 4, a new study finds.
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"The findings suggest an effect of birth weight differences on development of subsequent conduct problems," researchers led by Dr. David Mankuta of Hadassah Hebrew University Hospital in Jerusalem, said in a news release. "Further studies are needed to clarify the mediating factors of this effect."
The team studied 112 pairs of Israeli twins in which one weighed at least 20% more than the other. The twins were born in 2004 and 2005.
The researchers found that the heavier twin had more conduct problems in 41% of the twin pairs. The twin who weighed less had more conduct problems in only 21% of the cases.
The study findings were published in the May issue of Archives of Pediatrics & Adolescent Medicine.
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SOURCE: American Medical Association, news release, May 3, 2010