Drinking black tea may cut blood pressure

NEW YORK (Reuters Health) - People who enjoy drinking black tea throughout the day may get the added benefit of a slight reduction in their blood pressure, suggests a new Australian study.

Although the study cannot identify specific components of the tea that might lead to a drop in blood pressure, the researchers said past studies have shown flavonoids, compounds found in many plants such as tea, are good for heart health.

"The message really isn't for an individual to go out and drink a lot of tea," said Jonathan Hodgson, the study's lead author and a researcher from the University of Western Australia. He said, instead, the drop is like a bonus.

The study, published in the Archives of Internal Medicine, randomly assigned 95 Australians with normal blood pressure to two groups. One group drank black tea and another drank a beverage similar in taste and caffeine content.

Before the study started, the participants' blood pressure throughout the day was about 121/72 millimeters of mercury (mm Hg).

Blood pressure readings less than 120/80 mm Hg are considered normal. High blood pressure is defined as a reading of 140/90 or above. People with a reading between the two are said to have "pre-hypertension."

Each group drank their assigned beverages three times per day for six months.

After the six months the tea drinkers' systolic blood pressure -- the top number -- fell 2 mm Hg, and their diastolic blood pressure also fell about 2 mm Hg.

While a drop in blood pressure is generally good, a 2 mm Hg drop is not significant enough to bring a person with high blood pressure out of the danger zone.

"Those are small changes and are nothing like what you would see if you took a blood pressure lowering medication," said Dr. Joseph Vita, who has studied flavonoids at the Boston University School of Medicine and was not involved with the study.

However, the placebo group's systolic blood pressure went up about 1 mm Hg and their diastolic blood pressure also increased about 0.5 mm Hg.

To account for potential influences from other foods, researchers had the people in both groups cut back on flavonoid-rich foods such as apples, grapes, dark chocolate and wine four weeks before and all throughout the study.

Hodgson said making the placebo group go from a flavonoid-rich diet before the study to a lower one could have caused blood pressure to go up.

The research was funded through government grants and by Unilever Research and Development, which is an arm of the company that owns the Lipton brand.

According to the researchers, the findings might provide a bigger benefit if they are applied to a large group.

"You've got -- in the population -- large numbers of people with blood pressure around the hypertension range. So just shifting that population down can make a big difference," said Hodgson.

SOURCE: http://bit.ly/zJqgVE Archives of Internal Medicine, online.

Read more »

Posted in: HEALTH

Kids' health predicts parents' future heart disease

NEW YORK (Reuters Health) - When children have high cholesterol or blood pressure, their parents may have increased risks of diabetes and heart disease down the road, a new study finds.

The study, of 519 Ohio families, found that a 12-year-old's weight, cholesterol and blood pressure helped predict the odds of a parent developing heart disease, high blood pressure or diabetes over the next three decades.

Researchers say the findings suggest that screening kids could have the "bonus" of spotting at-risk parents.

"Pediatric risk factors -- cholesterol, triglycerides, high blood pressure -- identified families where parents were at increased risk," said Dr. Charles J. Glueck of Jewish Hospital of Cincinnati, one of the researchers on the study.

One reason that's important, he told Reuters Health, is that many parents may not get check-ups themselves, but will regularly take their kids to the doctor.

However, not everyone agrees that children should have numerous screening tests.

It's standard for children to have their weight and blood pressure measured at "well-child" visits to the pediatrician. But only recently did experts start recommending cholesterol checks.

In November, the U.S. National Institutes of Health issued new guidelines saying children should have their cholesterol measured between the ages of 9 and 11, and again between the ages of 17 and 21. The American Academy of Pediatrics also endorsed the recommendation.

That was a shift from what experts had traditionally recommended -- namely, screening cholesterol only in certain at-risk kids, like those with diabetes or a family history of early heart disease.

And some critics questioned the new guidelines, pointing out that there's no hard data showing that screening kids' cholesterol helps their heart health in the long run.

In 2007, the U.S. Preventive Services Task Force (USPSTF) -- an expert panel with federal support -- said there was "insufficient" evidence to recommend for or against routine cholesterol tests for children and teenagers.

"There is still a lot of debate going on," Glueck said.

But he thinks the current study, plus another recent analysis of the same group, give some needed information. "Our findings provide some hard data: If you know children's risk factors, what does that tell you? It tells you a lot," Glueck said.

HEART DISEASE, STROKE, DIABETES

The study, reported in the Journal of Pediatrics, included 852 school students who, at an average age of 12, had their cholesterol, blood pressure, triglycerides and weight measured. They were reassessed 26 years later -- as were their parents, who were 66 years old, on average.

In nearly half of the families -- 47 percent -- a parent had suffered a heart attack, stroke or needed a procedure to clear blocked heart arteries by the end of the study period. In 37 percent, a parent had developed diabetes.

Overall, Glueck's team found, parents were about twice as likely to suffer early heart disease or stroke (age 60 or younger) when their child had had high blood pressure at age 12.

Parents' odds of cardiovascular problems at any age were also higher when their child had had high levels of "bad" LDL cholesterol or triglycerides.

And when children were overweight, their parents' odds of developing diabetes or high blood pressure doubled.

In an earlier study, Glueck's team had found that childhood test results also predicted the kids' own risks of developing heart problems, diabetes and high blood pressure by their late-30s.

All of that suggests that childhood screenings can help predict future risks -- in kids and parents. But there is no hard evidence that screening children actually cuts their odds of diabetes or cardiovascular disease in the long run.

STUDY UNLIKELY

To pin that down, Glueck noted, researchers would have to follow a large group of screened children for decades into adulthood, and compare them to a group who'd been randomly assigned to forgo screening as kids.

"It's very unlikely a study like that would ever be done," Glueck said.

There's also a question of expense, since the cost of screening all children for high cholesterol adds up, for an uncertain benefit. And if a child were to be put on a cholesterol-lowering statin, no one is sure what the potential side effects of early and long-term use might be.

That's one reason the USPSTF did not come down on the side of universal screening.

According to Glueck, most children with high cholesterol could be treated with a healthier diet. It's estimated that about 15 to 20 children out of every 300 U.S. kids may have high cholesterol that's related to diet and lifestyle.

A smaller proportion -- about one in every 300 to 500 children -- have an inherited form of high cholesterol called familial hypercholesterolemia. That causes high LDL levels starting early in life, and often leads to heart disease by the time a person is in his 40s or 50s.

Those kids may be placed on statins.

SOURCE: http://bit.ly/xAS18e Journal of Pediatrics, online.

Read more »

Posted in: HEALTH

Talking things through in your head may help autism

LONDON (Reuters) - Teaching children with autism to "talk things through" in their heads may help them solve tricky day-to-day tasks and could increase the chances of them living independent lives when they grow up, British scientists said on Wednesday.

Psychologists who studied adults with autism found that the mechanism for using "inner speech", or talking things through in your head is intact, but they don't always use it in the same way as typically developing people do.

The researchers found that the tendency to "think in words" is also strongly linked to the extent of a person's communication skills, which are rooted in early childhood.

The results suggest teaching autistic children how to develop inner speech skills may help them cope with daily tasks later in life. It also suggests children with autism may do better at school if they are encouraged to learn their daily timetable verbally rather than using visual plans, which is currently a common approach.

Autism, which affects around one percent of the population worldwide, includes a spectrum of disorders ranging from mental retardation and a profound inability to communicate, to relatively milder symptoms such as seen in people with high-functioning autism or Asperger's syndrome.

Among core features of autism are poor communication skills and difficulties with social engagement.

"Most people will 'think in words' when trying to solve problems, which helps with planning or particularly complicated tasks," said David Williams of Durham University's department of psychology, who led the study.

Typically developing children tend to talk out loud to guide themselves through tricky tasks, and only from about 7 years old do they talk to themselves in their heads to try to solve problems, he said. How good people are at it is partly determined by their communication experiences as a young child.

Williams said children with autism often miss out on the early communicative exchanges, which may explain their tendency not to use inner speech when they are older. He said the lack of inner speech use might also contribute to some of the repetitive behaviours which are common in people with autism.

"Children with autism probably aren't doing this thinking in their heads, but are continuing on with a visual thinking strategy," Williams said in a telephone interview.

"So this is the time, at around six or seven years old, that these teaching methods would be most helpful."

The study, conducted by researchers at Durham, Bristol and City University London and scheduled to be published in an upcoming issue of the Development and Psychopathology journal, involved 15 adults with high-functioning autism and 16 neurotypical adults for comparison.

The volunteers were asked to complete a test of planning ability for which typical people would normally use "thinking in words" strategies.

When the two groups were asked to do the task while also repeating out loud a certain word -- such as "Tuesday" or "Thursday" -- designed to distract them, the control group found the task much harder, while the autistic group were not bothered by the distraction.

"In the people with autism, it had no effect whatsoever," Williams explained. This suggests that, unlike neurotypical adults, participants with autism do not normally use inner speech to help themselves plan.

SOURCE: http://bit.ly/wOazFh Development and Psychopathology, 2012.

Read more »

Posted in: HEALTH