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22 April 2015
Obesity  

 

Introduction

The Body Mass Index (BMI) is one of the methods for measuring overweight and obesity. It is calculated by dividing the body weight (in kg) by the square of height (in m): kg/m2. For Chinese adults living in Hong Kong, BMI from 23.0 to less than 25.0 kg/m2 is classified as overweight and BMI 25.0 kg/m2 or above is classified as obese.

Obesity increases the risk for a number of chronic diseases, such as hypertension, heart diseases, hypercholesterolaemia, diabetes mellitus, cerebrovascular disease, gall bladder disease, osteoarthritis, sleep apnoea and some types of cancer (breast, prostate, colorectal and endometrial).

Situation in Hong Kong

The Behavioural Risk Factor Survey April 2014 revealed that 39.0% of the population aged 18 - 64 were classified as overweight or obese (BMI ≥ 23.0), including 20.8% as obese. A higher proportion of males (49.6%) than females (29.5%) were classified as overweight or obese. People aged 45 - 54 had a highest rate (50.5%) of overweight or obesity.

Prevention

A balanced diet and regular physical activity are the proven ways to achieve and maintain an ideal body weight.

Related information

You may browse the Health Zone and "Change for Health" website for further advice on physical activity, healthy diet and common killer diseases associated with obesity.

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