Nutritionists employ similar tricks to establish what is a healthy body-mass index for children in different age groups.

营养学家采用类似手法来确定不同年龄段儿童的健康身体质量指标是多少。

youdao

But the study did account for a variety of factors, including age, body mass index and education.

不过，这项研究的确已经考虑到了很多因素，例如年龄、人群密集度和受教育程度等。

youdao

The researchers followed 5,000 high school seniors until middle age, tracking their body weight and body mass index (BMI) annually for 22 years.

研究人员跟踪调查了5000名高中学生，该调查一直持续直到他们步入中年，总计22年。研究人员每年会记录一次调查对象的体重和体质指数(BMI)。

youdao

The researchers found that sitting was associated with a higher death risk after controlling for factors including age, gender, smoking status, physical activity, education, body mass index, as well as living in an urban or city environment.

FORBES: Why Sitting Increases Your Risk of Dying Sooner