Waist circumference (WC) is a comprehensive indicator of total fat and fat distribution, the WHO recommended measurement method is: the subject stood, feet 25 to 30 cm apart, the weight evenly distributed. Measure the midpoint between the horizontal anterior superior iliac crest and the inferior border of 12th rib. Place the measuring scale close to the soft tissue, but do not compress it. The measurement is accurate to 0.1 cm. According to waist circumference detection of obesity, few mistakes. Measurement methods: the tape by 0.5 to 1 cm on the umbilical level around a week, obese people choose the lumbar level of the thickest waist around a week. Male waist greater than or equal to 90 cm for obesity, female waist greater than or equal to 80 cm for obesity. The waist circumference of the omnipotence (om) of the standard waist circumference calculation method: male: height (cm) ÷ 2-11 (cm), women: height (cm) ÷ 2-14 (cm), ± 5% of the normal range . The measured waist circumference of the population is almost within the normal range of the formula as long as the body mass index is almost in the normal range, waist circumference below or beyond the normal range of percentage and its corresponding body mass index decreased or increased the percentage is also basically consistent. Conclusion: The formula can correctly calculate the normal waist circumference of Chinese adults, which is accurate and convenient, practicality is better than body mass index, and monitoring can play an active role in early prevention of obesity, diabetes and cardiovascular diseases.

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