{"id":119172,"date":"2019-04-18T17:30:20","date_gmt":"2019-04-18T17:30:20","guid":{"rendered":"https:\/\/www.bnreport.com\/a-genetic-scorecard-could-predict-your-risk-of-being-obese\/"},"modified":"2019-04-18T17:30:20","modified_gmt":"2019-04-18T17:30:20","slug":"a-genetic-scorecard-could-predict-your-risk-of-being-obese","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/a-genetic-scorecard-could-predict-your-risk-of-being-obese\/","title":{"rendered":"A genetic scorecard could predict your risk of being obese"},"content":{"rendered":"

Theres a new way to predict whether a baby will grow into an obese adult.<\/p>\n

Combining the effect of more than 2.1 million genetic variants, researchers have created a genetic predisposition score<\/a> that they say predicts severe obesity. People with scores in the highest 10 percent weighed, on average, 13 kilograms (about 29 pounds) more than those with the lowest 10 percent of scores, the team reports April 18 in Cell<\/em>. The finding may better quantify genes roles in obesity than previous prediction scores, but still fails to account for lifestyle, which may be more important in determining body weight, other researchers say.<\/p>\n

Still, the study shows that \u201cyour genetics really start to take hold very early in life,\u201d says coauthor Amit Khera, a cardiologist at Massachusetts General Hospital and the Broad Institute of MIT and Harvard. Weight differences showed up as early as age 3, and by age 18, those with the highest scores weighed 12.3 kilograms more on average than those with the lowest scores, Khera and his colleagues found. Some people with high genetic scores had normal body weights, but those people may have to work harder to maintain a healthy weight than others, he says.<\/p>\n

People with the highest scores were 25 times more likely to have severe obesity \u2014 a body mass index (BMI) greater than 40 \u2014 than those with the lowest scores. BMI is a measurement of body fat based on height and weight. A BMI of 18.5 (calculated as kilograms per meters squared of height) to 24.9 is considered healthy. BMIs 30 and above are considered obese.<\/p>\n

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People with the highest 10 percent of scores on a genetic test for obesity risk were more likely to develop severe obesity as they aged than those with lower scores. Of 371 people in the highest score group, 58 (15.6 percent) became severely obese within 25 years. Of 2,979 people in the middle category, 166 (5.6 percent) became severely obese during that time. And only five of the 372 people (1.3 percent) with the lowest scores were severely obese.<\/p>\n

Using a genetic scorecard to predict obesity risk<\/strong><\/p>\n

The nearly 13-kilogram difference between people dealt a good genetic hand versus those dealt a bad one equals about five BMI points. \u201cFive points is a lot,\u201d Khera says. \u201cThats what takes you from normal to obese, from obese to severely obese.\u201d High scores were also associated with increased risk of heart disease, diabetes, high blood pressure and stroke.<\/p>\n

Other scientists are skeptical that the score is an accurate predictor of obesity risk.<\/p>\n

\u201cIm not convinced at all,\u201d says Ruth Loos, a genetic epidemiologist at the Icahn School of Medicine at Mount Sinai in New York City. Genes are responsible for about half of peoples susceptibility to obesity, but lifestyle factors such as diet and exercise are equally or even more important, she says. \u201cEven if you have a genetic score that perfectly captures that 50 percent of genetics, you still will not be able to predict anyones future risk of obesity.\u201d Without figuring in the lifestyle factors, \u201cyou will never be accurate.\u201d<\/p>\n

Together, the 2.1 million genetic variants used in the study account for less than 10 percent of genes contribution to obesity, making the score a blunt tool that could lead to inaccurate predictions, Loos says. For instance, the scores of 3,722 people in the Framingham Offspring study group \u2014 one group of people the researchers used to test their genetic score \u2014 suggested that 371 of the highest scorers would become severely obese. But only 58 of them did. \u201cThe score said bluntly, if youre in the top decile youll become severely obese,\u201d Loos says. \u201cSo you basically scared people who were not supposed to be scared.\u201d<\/p>\n

On the flip side, the score would have failed to warn 171 of the 229 severely obese people in the Framingham group that they would gain so much weight, she says. \u201cIf you simply use the score and donRead More \u2013 Source<\/strong><\/a>
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science news<\/a><\/h5>\n

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Theres a new way to predict whether a baby will grow into an obese adult.<\/p>\n

Combining the effect of m..<\/p>\n","protected":false},"author":1,"featured_media":119173,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-119172","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"\nA genetic scorecard could predict your risk of being obese - Business News Report<\/title>\n<meta name=\"description\" content=\"Theres a new way to predict whether a baby will grow into an obese adult. 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