Dental X-rays could double the risk for the most common brain tumor, according to a study released Tuesday from scientists and doctors at Yale, Harvard and other prestigious institutions published in Cancer, a scientific journal of the Americ
an Cancer Society.
It sounds frightening — and there is no question it invokes a serious warning — but even those who carried out the research urge people not to overreact.
“Our take home message is don’t panic. Don’t stop going to the dentist,” said the lead author of the study Dr. Elizabeth Claus, a neurological surgeon at Brigham and Women’s Hospital in Boston and the Yale School of Public Health.
But people “should have a conversation with their dentist” about the need to use X-rays as little as possible to keep teeth healthy, Claus says. That’s a conclusion few would dispute, with or without the new study.
The tumor studied is meningioma, a type that is usually not malignant, meaning it can grow but not spread. To be sure, it can cause severe problems in some patients. But people with meningiomas often live long, healthy lives with no treatment, dying of some other cause. Doctors diagnose about 5,000 cases a year in the United States, about three times as often in women as in men.
Significantly, the study is the weakest type of epidemiology, a so-called “case control” study. The researchers interviewed 1,433 people diagnosed with meningioma and compared them with 1,350 people with no such diagnosis. The two groups were matched for age, gender, race, income and places of residence. In a tiny portion of the cases the researchers actually looked at dental records. But, most often, they asked the study subjects – whose average age was 57 — to recall their history of dental X-rays going back to childhood.
Spanking found to have negative effects on low-income toddlers
Washington, September 16 (ANI): Spanking negatively affects the behaviour of toddlers in low-income families, according to a new study.
Published in the journal Child Development, the longitudinal study looked at how low-income parents discipline their young children.
It showed that spanking 1-year-olds leads to more aggressive behaviours and less sophisticated cognitive development in the next two years.
Verbal punishment, however, was not found to be associated with such effects, especially when it was accompanied by emotional support from mothers.
Besides, 1-year-olds’ fussiness predicted spanking and verbal punishment at ages 1, 2, and 3.
The study explored whether mothers’ behaviours lead to problematic behaviour in children, whether children’s challenging behaviours elicit harsher discipline, or both.
It looked at more than 2,500 exclusively low-income White, African American, and Mexican-American mothers and their young children, interviewing and observing them at home when the children were 1, 2, and 3 years old.
All participants’ family incomes were at or below the federal poverty level.
Using their own interpretations of spanking, mothers reported how often anyone in the home had spanked their children in the past week.
The study also looked at how often mothers verbally punished-scolded, yelled, or made negative comments-their children.
It showed that African American children were spanked and verbally punished significantly more than the other children in the study.
The authors speculated that that might be due to cultural factors, such as belief in the importance of children’s respect for elders and in the value of physical discipline to instil that respect.
Moreover, some African American mothers said that in preparing their children for a harsh, physically dangerous, and racially discriminating world, there was little room for error in their childrearing.
The study also shed light on information about the effects of such types of discipline.
“Our findings clearly indicate that spanking affects children’s development,” said Lisa J. Berlin, research scientist at the Center for Child and Family Policy at Duke University and the study’s lead author.
Specifically, children who were spanked more often at 1 behaved more aggressively when they were 2, and had lower scores on tests measuring thinking skills when they were 3.
Similar findings were made even after taking into consideration such family characteristics as mothers’ race and ethnicity, age, and education; family income and structure; and the children’s gender.
The study also found that children who were more aggressive at age 2, and had lower cognitive development scores at ages 1 and 2, were not spanked more at ages 2 and 3.
“So the mothers’ behaviours look more influential than the children’s,” said Berlin.
Unlike spanking, however, verbal punishment alone didn’t affect either children’s aggression or their cognitive development.
Interestingly, when verbal punishment was accompanied by emotional support from moms, the children did better on the tests of cognitive ability. (ANI)