The study, published in the International Journal of Obesity, examined the electronic medical records of 163,820 children ages 3 to 18, counting antibiotic prescriptions, body weight and height.

这项发表在《国际糖尿病杂志》的研究涉及163820名年纪从3岁到18岁的儿童，研究人员查看他们服用抗生素的次数，身高以及体重的医疗记录。

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Obesity is based on the body mass index, a calculation using height and weight.

肥胖是根据身体质量指数，用身高和体重计算出来的结果。

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Doctors often assess a patient's risk of coronary artery disease by looking at their body mass index - a measure that takes into account someone's weight and height.

医生通常会评估身体质量以测量病人罹患换冠心病的风险，这样的一种测量方法需要参考病人的体重和身高。

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They measured height, weight and body mass index - calculated by dividing weight in kilograms by the square of your height in metres.

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The studies measured the participants' body mass index (BMI), a ratio of their height and weight, but it wasn't able to take into account their body fat composition, or how much of their overall body weight was made up of fat versus muscle.

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All models were required to have a body mass index -- a ratio of height and weight -- above 18, the minimum limit considered healthy by the World Health Organization.

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