Life-threatening ailments like heart dis­ease, cancer, stroke and Type 2 diabetes most often afflict adults. But they are of­ten consequences of childhood obesity.

Two new studies, conducted among more than half a million children in Den­mark who were followed for many years, linked a high body mass index in children to an increased risk of developing colon cancer and suffering an early stroke as adults. The studies, presented at the European Obesity Summit in Gothenburg, Sweden, this spring, un­derscore the importance of preventing and reversing undue weight gain in young children and teenagers.

One study, of more than 257,623 people, by Dr. Britt Wang Jensen and colleagues at the Institute of Preventive Medicine, in Bispebjerg, Denmark, and Frederiksberg Hospital in Copenhagen, grouped children according to standard deviations from a mean B.M.I., adjusted for a child's age and sex. They found that each unit of increase in being over­weight at age 13, generally correspond­ing to a two- to three-point increase in B.M.I, increased the risk of developing colon cancer by 9 percent and rectal cancer by 11 percent.

The second study, involving 307,677 Danish people born from 1930 to 1987, used a similar grouping of B.M.I. The risk of developing a clot-related stroke in early adult life increased by 26 per­ cent in women and 21 percent in men for each unit of increase in being over­weight at all stages of childhood, but es­pecially at age 13.

Though neither study proves that ex­cess weight in childhood itself, as op­posed to being overweight as an adult, is responsible for the higher rates of cancer and stroke, overweight children are much more likely to become overweight adults — unless they adopt and maintain healthier patterns of eating and exercise.

According to the American Academy of Child and Adolescent Psychiatry, obesity most often develops between ages 5 and 6 or during the teen years, and "studies have shown that a child who is obese between the ages of 10 and 13 has an 80 percent chance of becoming an obese adult."

In a study published in 2014 in The New England Journal of Medicine, Sol­veig A. Cunningham and colleagues at Emory University found that "over­weight 5-year-olds were four times as likely as normal-weight children to be­come obese by age 14." The study, which involved a representative sample of 7,738 kindergartners, found that the-risk of becoming obese did not differ by so­cioeconomic status, race or ethnic group, or birth weight. Rather, it showed that excess weight gain early in life is a risk factor for obesity later in childhood across the entire population. Children are generally considered obese when their weight is 10 percent or more above than recommended for their height and body type. Currently, about one-third of American children are overweight or obese. By 2012, the Centers for Disease Control and Preven­tion reports, 18 percent of children and 21 percent of adolescents were obese.

The adverse effects of excess weight in childhood and adolescence don't neces­sarily wait to show up later in life. In a re­view of complications resulting from youthful obesity, Dr. Stephen R. Daniels, a pediatrician at the University Of Color­ado School Of Medicine and the Chil­dren's Hospital in Denver, found that problems in many organ systems are of­ten apparent long before adulthood. They include high blood pressure; insulin re­sistance and Type 2 diabetes; high blood levels of heart-damaging triglycerides and low levels of protective high-density lipoprotein (HDL) cholesterol; nonalco­holic fatty liver disease; obstructive sleep apnea; asthma; and excess stress on the musculoskeletal system resulting in abnormal bone development, knee and hip pain and difficulty walking.

Problems of youthful obesity go be­yond physical ones. Obese adolescents have higher rates of depression, which in itself may foster poor eating and ex­ercise patterns that add to their weight problem and result in a poor quality of life that persists into adulthood.

In a study conducted in Singapore, re­searchers reported that "individuals who were obese in childhood are more likely to have poor body image and low self-esteem and confidence, even more so than those with adult onset obesity."

Another study by Dr. Jeffrey B. Schwimmer of the University of Califor­nia, San Diego, and colleagues found that obese children and adolescents reported a diminished quality of life that was com­parable to that of children with cancer.

Taken together, the data speak to the critical importance of preventing undue weight gain in young children, a task that depends largely on parents, who are responsible for what, and how much chil­dren eat and how much physical activity they engage in. As researchers from the University Medical Center Groningen in the Netherlands put it, "Early recogni­tion of overweight or obesity in children by their parents is of utmost importance, allowing interventions to start at a young age." Yet, they found in a study of the parents of 2,203 5-year-olds, "par­ents underestimated their overweight child in 85 percent of the cases."

Though it seems logical that parents who think their children are overweight would make a special effort to assure they would "grow into" their weight as they get older, research has shown just the opposite. Such children tend to get even fatter, according to findings from the Longitudinal Study of Australian Children reported in April in the journal Pediatrics by Eric Robinson of the Uni­versity of Liverpool and Angelina R. Sutin of Florida State University Col­lege of Medicine.

"I encourage parents to change the environment at home," Dr. Daniels of the University of Colorado said in an in­terview. "Without being authoritarian, they should limit high-calorie-dense foods, keep sugar-sweetened beverages out of the house and assure that kids eat the right amount of fruits and vegeta­bles and fewer calorie-dense snacks. Parents also need to be tuned into op­portunities for physical activity and set hard-and-fast rules about television and time spent on electronics."

Following the "5210" daily program endorsed by the American Academy of Pediatrics can help: Aim for five fruits and vegetables a day; keep recreational screen time to two hours or less; include at least one hour of active play, and skip sweetened beverages and drink water.


Kindly Reprinted

Courtesy of International New York Times

Author Jane E. Brody