vo Dinov
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 Calculator for the Body Mass Index for Adults

English Calculation

 Height: feet and inch(es) Weight: pounds (Note: 8 ounces = 0.5 pounds) Your BMI:
 BMI Weight Status Below 18.5 Underweight 18.5 – 24.9 Normal 25.0 – 29.9 Overweight 30.0 and Above Obese

What Does This All Mean?

 BMI = ( Weight in Pounds              (Height in inches) x (Height in inches) ) x 703

Metric Calculation

 Height: Meters (Note: 1 Meter = 100cm) Weight: Kilograms Your BMI:

 BMI Weight Status Below 18.5 Underweight 18.5 – 24.9 Normal 25.0 – 29.9 Overweight 30.0 and Above Obese

What Does This All Mean?

 BMI = Weight in Kilograms              (Height in Meters) x (Height in Meters)

 Obesity continued to increase dramatically during the late 1990s Nearly 33% of all adults now classified as obese, according to new data from the 1999-2000 National Health and Nutrition Examination. Nowadays 31 % of adults 20 years of age and over (~59 million people) have a body mass index (BMI) of 30 or greater, In 1994 23 % of adults were obese according to the National Center for Health Statistics,enters for Disease Control and Prevention (CDC). Number of Children who are overweight (defined as BMI-for-age at or above the 95th % of the CDC Growth Charts) continues to increase.  Children and teens ages 6-19, 15 % (almost 9 million) are overweight according to the 1999-2000 data, or triple what the proportion was in 1980.  Virtually a doubling in the number of obese persons over the past 20 yrs has profound health implications.  Obesity increases a person's risk for a number of serious conditions, including:  diabetes, heart disease, stroke, high blood pressure, and some types of cancer. Gender/Race: More adult women are obese (33 %) than men (28 %), with the problem greatest among non-Hispanic black women (50 %) compared with Mexican-American women (40 %) and non-Hispanic white women (30 %).  There was practically no difference in obesity levels among men based on race/ethnicity. CDC/NCHS Web site

Hands-On
2. Tally BMI's for entire class and make a histogram (SOCR):

 BMI < 19 20 21 22 23 24 25 26 27 28 29 > 30 Frequency

3. Compute Mean and Standard Deviation of the class BMI measures
4. Proportion of students in each category: underweight, normal, overweight, obese
5. What is the 90% for the BMI measures for the class?
6. What is the central 80% of the MBI indeces? Can we assume a Normal model for BMI (SOCR demo)?
7. What's the upshot of this hands-on demo?

A Complete Chart of BMI categorization for Adults

Increasing prevalence 1991 to 2001 in Australia
by Catherine Chittleborough ( ~ n=3000 per year)
 1991 % (95% CI) 2001 % (95% CI) Underweight (<18.5) 4.2 (3.5 – 5.0) 3.0 (2.4 – 3.8) Normal (18.5-24.9) 57.9 (56.1 – 59.7) 46.2 (44.3 – 48.2) Overweight (25.0-29.9) 27.6 (26.0 – 29.3) 33.0 (31.2 – 34.9) Obese (30.0-34.9) 8.1 (7.1 – 9.1) 12.1 (10.8 – 13.4) Severely obese (35.0) 2.2 (1.7 – 2.9) 5.7 (4.9 – 6.7)

 Adults Women Men anorexia < 17.5 underweight <19.1 <20.7 Normal Range 19.1-25.8 20.7-26.4 marginally overweight 25.8-27.3 26.4-27.8 overweight 27.3-32.3 27.8-31.1 very overweight or obese >32.3 >31.1 severely obese 35 - 40 morbidly obese 40 - 50 super obese 50 - 60 kg/m2

Calculators designed and provided by CDC (http://www.cdc.gov/nccdphp/dnpa/bmi/calc-bmi.htm)

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