Thursday, March 26, 2009

Formulas for Calculating Ideal Body Weight

In fact, the formula to calculate the ideal body weight have been there since more than seabad ago. Ideal body weight formula that first made by a French surgeon called Dr. P.P. Broca in 1897 (Halls, 2005).

Along with time, Broca formula has had many modifications. This can be seen at least three of the following quote.

Broca formula as quoted from the writings of Steven B. Halls (2005) is:

Women: Ideal Body Weight (kg) = Height Agency (cm) - 100 ± 15%
Men: Ideal Body Weight (kg) = Height Agency (cm) - 100 ± 10%
While the formula Broca's publications cited in the MOH RI Website is:

Ideal body weight (kg) = 90% x (high body (cm) - 100) x 1 kg
Special for men with high body less than 160 cm and females less than 150 cm, use the formula: ideal body weight (kg) = (high-body (cm) - 100) x 1 kg
Interpretation: if someone said underweight body weight of less than 90% ideal body weight.
Others published in The People (2004):

(High Body - 100) - 10% (Higher National - 100), for age <= 30 th The high - 100, for age> 30 th
But many people use a very simplified formula, namely:

Ideal Body Weight = (High Board - 100) - 10% (Higher National - 100)
Then in 1974 Dr. Devine BJ publish a new formula to calculate the ideal body weight. The formula is (Halls, 2005):

Men: Ideal Body Weight (in kilograms) = 50 + 2.3 kg per inch over 5 feet
Women: Ideal Body Weight (in kilograms) = 45.5 + 2.3 kg per inch over 5 feet
Devine formula is made for use in the medical world, that is the dose of certain drugs such as digoksin, teofilin, or gentamisin. But then the more widespread use. Most formula-the formula of ideal body weight displayed on the websites using this formula.

In the year 1983, Dr. JD Robinson published the formula ideal body weight of the modified formula Devine (Halls, 2005).

Men: Ideal Body Weight (in kilograms) = 52 kg + 1.9 kg for each inch over 5 feet
Women: Ideal Body Weight (in kilograms) = 49 kg + 1.7 kg for each inch over 5 feet
Devine formula modification is also done by Dr. DR Miller. The formula is (Halls, 2005):

Men: Ideal Body Weight (in kilograms) = 56.2 kg + 1.41 kg for each inch over 5 feet
Women: Ideal Body Weight (in kilograms) = 53.1 kg + 1.36 kg for each inch over 5 feet
Both formulas Devine, Robinson, and Miller seems to only be available in units of inches and feet (feet). While the unit in the cm does not find the author at this paper is made.

Another formula used to determine the status of body weight is Body Mass Index (BMI or IMT, body mass index). The formula is commonly used in the health sector, including by the WHO (World Health Organization).

In the formula IMT, status body weight is calculated to compare with body weight (kg) with high body square (m). The formula is:

IMT = BB / (TBxTB)
If the value of IMT have been obtained, the results compared with the following provisions:

IMT value <= 18.5 body weight less IMT values 18.5 - 22.9 = Normal IMT values 23-24,9 = Normal High IMT values 25.0 - 29.9 = fat IMT value> = 30.0 = fat Banget
Source: Adapted from the WHO criteria
Example the use of IMT formula: For example, A has weight 60 kg with a body of 1.69 m high, the IMTnya is 60 / (1.69 x1, 69) = 21.01. IMT with a value of 21.01, including body weight in a normal category.

Reference: Halls SB (2005) : About arithmetic formulas for calculating ideal body weight.

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