Study looked at rise in body fat, waist size and salt intake over 13-year period
WebMD News from HealthDay
By Steven Reinberg
HealthDay Reporter
MONDAY, July 15 (HealthDay News) -- The risk for high blood pressure in American teens and children increased 27 percent over 13 years, a new study finds, as waistlines thickened and kids consumed more salt in their diets.
"High blood pressure is the predominant risk factor for stroke, and stroke rates have been rising in children in the U.S. over recent years," said Dr. David Katz, director of the Yale University Prevention Research Center. He was not involved with the study.
Harvard researchers collected data on more than 3,200 children aged 8 to 17 who took part in the National Health and Nutrition Examination Survey from 1988 to 1994, comparing them to more than 8,300 kids in the same survey from 1999 to 2008.
Although children in the study had elevated blood pressure, they could not be classified as hypertensive, because readings must be high three times in a row to make that diagnosis, the researchers noted.
As the obesity epidemic continues, doctors are seeing more children with high blood pressure, an expert said.
"Today alone I will see 10 to 15 [patients], mostly teenagers, that are overweight with hypertension," said Dr. Ana Paredes, a pediatric nephrologist at Miami Children's Hospital.
The first step in treating these children is to change their diet and increase the amount of exercise they do, Paredes said. "I give them a plan they can follow," she said. "I tell them to try to lose a pound a week."
Paredes also counsels her patients to reduce the salt in their diet. Much of the salt that children consume comes from processed foods and drinks like sodas, she said. "If you are drinking Gatorade while watching TV or working on the computer, you're just intoxicating yourself with salt," she said.
Katz said that the new study adds to the weight of evidence that sodium intake affects blood pressure in children as well as adults.
"The pathway from increased sodium intake to elevated blood pressure to rising incidence of stroke is cause for both concern and corrective action," Katz said.
Americans eat an average 3,400 milligrams (mg) of salt every day -- that's more than twice the American Heart Association's recommendation of 1,500 mg or less. Two-thirds of the salt is from processed foods and restaurant meals.
The association between body-mass index -- a measure of body fat -- and blood pressure is even stronger than the association with sodium, Katz noted. "As obesity rates rise in our kids, so, too, does their blood pressure," Katz said.
The high salt content of processed food is correctable as are the influences making children obese, he said. "If we needed another reason to take action, this study provides one. As our kids' blood pressure rises, so does the pressure on us all to do what's necessary to put a stop to these trends."
source : More U.S. Kids May Be at Risk for High Blood Pressure
