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BODY MASS INDEX of an individual is calculated by the following formula :
Body weight in Kgs. / Square of Height in Mts. Example: Suppose a person having body weight 66 Kgs. has a height of 1.65 Mts. Then BMI of the person = 66 / 1.65 ^2 = 24.24 (Approx.). This figure is related to the status of our core-health.
At present, BMI has become a medical term which is being used so often that one cannot ignore it, rather, one should not ignore it. The Dreadful disease, just after Cancer, Diabetes is directly related to it, as the latest research works say.
Knowing BMI and spreading its importance among ordinary members of the public is not related to Medical Business going round the world in crores of dollars; so big business houses are not much interested in the issue, in fact, it should be so, as far as business policy go. But you and me cannot go without its discussion and translating its importance in our daily life.
Diabetes, to be precise, Diabetes type 2 is directly related to one’s BMI, i.e., by simply controlling BMI one can prevent the dreadful disease to a large extent. Following information has been collected from some source in the Interenet which is worth-reading. I am expressing my indebtedness to the writer of the source openly and since my website has no copyright, I venture to add this here for the benefit of all.
The standard weight status categories associated with BMI ranges for adults are shown in the following table:
30.0 and above
BMI of less than 18.5
A BMI of less than 18.5 indicates that you are underweight, so you may need to put on some weight. You are recommended to ask your doctor or a dietitian for advice.
BMI of 18.5-24.9
A BMI of 18.5-24.9 indicates that you are at a healthy weight for your height. By maintaining a healthy weight, you lower your risk of developing serious health problems.
BMI of 25-29.9
A BMI of 25-29.9 indicates that you are slightly overweight. You may be advised to lose some weight for health reasons. You are recommended to talk to your doctor or a dietitian for advice.
BMI of over 30
A BMI of over 30 indicates that you are heavily overweight. Your health may be at risk if you do not lose weight. You are recommended to talk to your doctor or a dietitian for advice.
According to the World Health Organization (WHO), there has been growing debate about whether there are possible needs for developing different BMI cut-off points for different ethnic groups. This is due to the increasing evidence that the associations between BMI, percentage of body fat, and body fat distribution differ across populations and therefore, the health risks increase below the cut-off point of 25 kg/m2 that defines overweight in the current WHO classification.
The WHO Expert Consultation have concluded that the proportion of Asian people with a high risk of type 2 diabetes and cardiovascular disease is substantial at BMIs lower than the existing WHO cut-off point for overweight (= 25 kg/m2).
However, the cut-off point for observed risk varies from 22 kg/m2 to 25 kg/m2 in different Asian populations and for high risk, it varies from 26 kg/m2 to 31 kg/m2. The Consultation, therefore, recommend that the current WHO BMI cut-off points in the table below should be retained as the international classification.
The cut-off points of 23, 27.5, 32.5 and 37.5 kg/m2 are to be added as points for public health action. It was, therefore, recommended that countries should use all categories (i.e., 18.5, 23, 25, 27.5, 30, 32.5 kg/m2, and in many populations, 35, 37.5, and 40 kg/m2) for reporting purposes, with a view to facilitating international comparisons.
The WHO international classification of adult underweight, overweight and obesity according to BMI
Obese class I
Obese class II
Obese class III
For clinical and research purposes, obesity is divided into three categories: Class I (30-34.9), Class II (35-39.9) and Class III (40+). With the growth of extreme obesity, researchers and clinicians have further divided Class III into super-obesity (BMI 50-59) and super-super-obesity (BMI 60+).
Studies have shown that people with a BMI of 30 or more have an increased risk of death from diseases such as heart disease, diabetes and colorectal cancer.8 According to some estimates, a BMI of 30 and over also increases the risk of death from any cause by 50-150%.11
There are also significant issues with being underweight on the BMI scale such as an increased risk of malnutrition, osteoporosis and anemia.
Ethnicity, BMI and diabetes risk
Certain ethnic groups including black or Asian, are at risk of certain health problems at a lower BMI than others.
South Asian and Chinese adults, who have a higher risk of developing type 2 diabetes than white populations, are advised to maintain a BMI lower than the standard 25.13
The advice is:
BMI of 23: Asians with a BMI score of 23 or more are at increased risk of developing type 2 diabetes
BMI of 27.5: Asians with a BMI of 27.5 or more are at high risk of developing type 2 diabetes.
Although the evidence is less clear-cut, black people and other minority groups are also advised to maintain a BMI below 25 to reduce their risk of type 2 diabetes.