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Height Waist Index
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About HWI 

Height Waist Index

Most of us have heard about or used Body Mass Index (BMI). Despite many researches found BMI is related to the risk of many diseases. However, in some cases, BMI is only very weakly or not related at all. Please review the discussion in my book, Carbohydrates Can Kill. 

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In many recent researches, the waist circumference (or waistline) is much closely related to the risk of diseases. For convenience, I developed a formula on August 22, 2007. The Height Waist Index (HWI) is

 

    Waist Circumference*  X 200

HWI = ----------------------------------------- - 80

Height

 

There is no question about measuring your height. However, there is an important reminder for you when you measure your waist circumference. The conventional instruction requires you measure the waistline at one inch above your navel (belly button). However, for HWI, you measure your Waist Circumference* at the level of your navel, while you are flatly on your back.

I made a table for your reference. The unit for this table is “inch” for both height and waist circumference. The top row of the table is HWI. The left first column is the height in “inch.” The value at the crossing point between the HWI and the height is the waist circumference in "inch."

If you use centimeter, you simply place your height and  Waistline* in centimeter in the above formula and get your HWI. 

Tentatively, the values of HWI between 10.1 and 20 are within the healthy range. However, the lower the value is, the closer the weight is toward underweight. A HWI at 10.0 and below is likely unhealthy. On the other hand, the values between 20.1 and 30.0 are overweight. At the same time, the higher the HWI is, the closer the weight is toward obesity. A value at 30.1 and over is obese and likely unhealthy.

After using HWI in many more studies, we should be able to test if HWI is a good predictor for diseases. Most importantly, all of us should watch closely our growing waistline.


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August 22, 2007                                                                         Robert K. Su, M.D.

Height Waist Index


  8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
50 22.2 22.4 22.6 22.8 23.1 23.3 23.5 23.8 24.0 24.3 24.5 24.8 25.0 25.3 25.5 25.8 26.0 26.3 26.5 26.8 27.1 27.3 27.6 27.9 28.2 28.5 28.7
51 22.6 22.8 23.1 23.3 23.5 23.8 24.0 24.3 24.5 24.7 25.0 25.2 25.5 25.8 26.0 26.3 26.5 26.8 27.1 27.3 27.6 27.9 28.2 28.4 28.7 29.0 29.3
52 23.0 23.3 23.5 23.8 24.0 24.2 24.5 24.7 25.0 25.2 25.5 25.7 26.0 26.3 26.5 26.8 27.1 27.3 27.6 27.9 28.2 28.4 28.7 29.0 29.3 29.6 29.9
53 23.5 23.7 24.0 24.2 24.5 24.7 24.9 25.2 25.5 25.7 26.0 26.2 26.5 26.8 27.0 27.3 27.6 27.9 28.1 28.4 28.7 29.0 29.3 29.6 29.9 30.2 30.5
54 23.9 24.2 24.4 24.7 24.9 25.2 25.4 25.7 25.9 26.2 26.5 26.7 27.0 27.3 27.5 27.8 28.1 28.4 28.7 28.9 29.2 29.5 29.8 30.1 30.4 30.7 31.0
55 24.4 24.6 24.9 25.1 25.4 25.6 25.9 26.2 26.4 26.7 27.0 27.2 27.5 27.8 28.1 28.3 28.6 28.9 29.2 29.5 29.8 30.1 30.4 30.7 31.0 31.3 31.6
56 24.8 25.1 25.3 25.6 25.8 26.1 26.4 26.6 26.9 27.2 27.4 27.7 28.0 28.3 28.6 28.8 29.1 29.4 29.7 30.0 30.3 30.6 30.9 31.2 31.6 31.9 32.2
57 25.3 25.5 25.8 26.0 26.3 26.6 26.8 27.1 27.4 27.7 27.9 28.2 28.5 28.8 29.1 29.4 29.7 30.0 30.3 30.6 30.9 31.2 31.5 31.8 32.1 32.4 32.8
58 25.7 26.0 26.2 26.5 26.8 27.0 27.3 27.6 27.9 28.1 28.4 28.7 29.0 29.3 29.6 29.9 30.2 30.5 30.8 31.1 31.4 31.7 32.0 32.4 32.7 33.0 33.3
59 26.1 26.4 26.7 26.9 27.2 27.5 27.8 28.1 28.3 28.6 28.9 29.2 29.5 29.8 30.1 30.4 30.7 31.0 31.3 31.6 31.9 32.3 32.6 32.9 33.2 33.6 33.9
60 26.6 26.9 27.1 27.4 27.7 28.0 28.2 28.5 28.8 29.1 29.4 29.7 30.0 30.3 30.6 30.9 31.2 31.5 31.8 32.2 32.5 32.8 33.1 33.5 33.8 34.1 34.5
61 27.0 27.3 27.6 27.9 28.1 28.4 28.7 29.0 29.3 29.6 29.9 30.2 30.5 30.8 31.1 31.4 31.7 32.1 32.4 32.7 33.0 33.4 33.7 34.0 34.4 34.7 35.1
62 27.5 27.8 28.0 28.3 28.6 28.9 29.2 29.5 29.8 30.1 30.4 30.7 31.0 31.3 31.6 31.9 32.3 32.6 32.9 33.2 33.6 33.9 34.2 34.6 34.9 35.3 35.6
63 27.9 28.2 28.5 28.8 29.1 29.4 29.7 30.0 30.3 30.6 30.9 31.2 31.5 31.8 32.1 32.5 32.8 33.1 33.4 33.8 34.1 34.5 34.8 35.1 35.5 35.8 36.2
64 28.4 28.7 28.9 29.2 29.5 29.8 30.1 30.4 30.7 31.0 31.4 31.7 32.0 32.3 32.6 33.0 33.3 33.6 34.0 34.3 34.7 35.0 35.3 35.7 36.1 36.4 36.8
65 28.8 29.1 29.4 29.7 30.0 30.3 30.6 30.9 31.2 31.5 31.9 32.2 32.5 32.8 33.2 33.5 33.8 34.2 34.5 34.8 35.2 35.5 35.9 36.3 36.6 37.0 37.4
66 29.3 29.5 29.8 30.1 30.5 30.8 31.1 31.4 31.7 32.0 32.3 32.7 33.0 33.3 33.7 34.0 34.3 34.7 35.0 35.4 35.7 36.1 36.5 36.8 37.2 37.6 37.9
67 29.7 30.0 30.3 30.6 30.9 31.2 31.5 31.9 32.2 32.5 32.8 33.2 33.5 33.8 34.2 34.5 34.9 35.2 35.6 35.9 36.3 36.6 37.0 37.4 37.7 38.1 38.5
68 30.1 30.4 30.7 31.1 31.4 31.7 32.0 32.3 32.7 33.0 33.3 33.7 34.0 34.3 34.7 35.0 35.4 35.7 36.1 36.5 36.8 37.2 37.6 37.9 38.3 38.7 39.1
69 30.6 30.9 31.2 31.5 31.8 32.2 32.5 32.8 33.1 33.5 33.8 34.2 34.5 34.8 35.2 35.5 35.9 36.3 36.6 37.0 37.4 37.7 38.1 38.5 38.9 39.3 39.7
70 31.0 31.3 31.7 32.0 32.3 32.6 33.0 33.3 33.6 34.0 34.3 34.7 35.0 35.4 35.7 36.1 36.4 36.8 37.2 37.5 37.9 38.3 38.7 39.0 39.4 39.8 40.2
71 31.5 31.8 32.1 32.4 32.8 33.1 33.4 33.8 34.1 34.4 34.8 35.1 35.5 35.9 36.2 36.6 36.9 37.3 37.7 38.1 38.4 38.8 39.2 39.6 40.0 40.4 40.8
72 31.9 32.2 32.6 32.9 33.2 33.6 33.9 34.2 34.6 34.9 35.3 35.6 36.0 36.4 36.7 37.1 37.5 37.8 38.2 38.6 39.0 39.4 39.8 40.2 40.6 41.0 41.4
73 32.4 32.7 33.0 33.3 33.7 34.0 34.4 34.7 35.1 35.4 35.8 36.1 36.5 36.9 37.2 37.6 38.0 38.4 38.7 39.1 39.5 39.9 40.3 40.7 41.1 41.5 42.0
74 32.8 33.1 33.5 33.8 34.1 34.5 34.8 35.2 35.5 35.9 36.3 36.6 37.0 37.4 37.7 38.1 38.5 38.9 39.3 39.7 40.1 40.5 40.9 41.3 41.7 42.1 42.5
75 33.2 33.6 33.9 34.3 34.6 35.0 35.3 35.7 36.0 36.4 36.8 37.1 37.5 37.9 38.3 38.6 39.0 39.4 39.8 40.2 40.6 41.0 41.4 41.8 42.3 42.7 43.1
76 33.7 34.0 34.4 34.7 35.1 35.4 35.8 36.1 36.5 36.9 37.2 37.6 38.0 38.4 38.8 39.2 39.5 39.9 40.3 40.7 41.1 41.6 42.0 42.4 42.8 43.2 43.7
77 34.1 34.5 34.8 35.2 35.5 35.9 36.2 36.6 37.0 37.4 37.7 38.1 38.5 38.9 39.3 39.7 40.1 40.5 40.9 41.3 41.7 42.1 42.5 43.0 43.4 43.8 44.3
78 34.6 34.9 35.3 35.6 36.0 36.4 36.7 37.1 37.5 37.8 38.2 38.6 39.0 39.4 39.8 40.2 40.6 41.0 41.4 41.8 42.2 42.7 43.1 43.5 43.9 44.4 44.8
79 35.0 35.4 35.7 36.1 36.4 36.8 37.2 37.6 37.9 38.3 38.7 39.1 39.5 39.9 40.3 40.7 41.1 41.5 41.9 42.3 42.8 43.2 43.6 44.1 44.5 45.0 45.4
80 35.5 35.8 36.2 36.5 36.9 37.3 37.7 38.0 38.4 38.8 39.2 39.6 40.0 40.4 40.8 41.2 41.6 42.0 42.5 42.9 43.3 43.7 44.2 44.6 45.1 45.5 46.0
81 35.9 36.3 36.6 37.0 37.4 37.7 38.1 38.5 38.9 39.3 39.7 40.1 40.5 40.9 41.3 41.7 42.1 42.6 43.0 43.4 43.9 44.3 44.7 45.2 45.6 46.1 46.6
82 36.3 36.7 37.1 37.5 37.8 38.2 38.6 39.0 39.4 39.8 40.2 40.6 41.0 41.4 41.8 42.2 42.7 43.1 43.5 44.0 44.4 44.8 45.3 45.7 46.2 46.7 47.1
83 36.8 37.2 37.5 37.9 38.3 38.7 39.1 39.5 39.9 40.3 40.7 41.1 41.5 41.9 42.3 42.8 43.2 43.6 44.1 44.5 44.9 45.4 45.8 46.3 46.8 47.2 47.7
84 37.2 37.6 38.0 38.4 38.8 39.1 39.5 39.9 40.3 40.8 41.2 41.6 42.0 42.4 42.8 43.3 43.7 44.1 44.6 45.0 45.5 45.9 46.4 46.9 47.3 47.8 48.3



























Height: Inch or Centimeter       Ideal Index: 10.1-20.0

Waist: Inch or Centimeter Overweight: 20.1-30.0

at the navel in supine. Underweight: 10.0 and below

Obesity: 30.1 and over


    200 W

HWI = -----------  - 80

 H

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A Request to Clinical Researchers

If you are interested, please try the HWI with the tentative ranges to define normal, underweight, overweight, and obesity in your researches and test them for their relevancy to the risk of diseases. I would appreciate your input if you try HWI. Thank you very much.

Robert Su, M.D.

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Watch Your Waistline!