BMI for Adult

A Project Presentation for Developing Data Product course

  • Author: Linghuan Zeng
  • Date: 9/21/2014

Contents

  • What's BMI?

  • How to calculate BMI for adult?

  • How to interprete BMI result?

BMI and BMI Formulae (for Adult)

  • Body Mass Index (BMI) is a number calculated from a person's weight and height
  • Calculation:
    • Formula 1 : Weight (kg) / [Height (meter)]2
      or
    • Formula 2 : ( Weight (lb) / [Height (inch)]2 ) * 703

BMI (for Adult) Interpretation

  • BMI can be considered an reliable alternative for direct measures of body fat.
  • BMI is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems.
  • Below is the relationship between BMI and Weight Status for adult.
BMI Weight Status
Below 18.5 Underweight
18.5 – 24.9 Normal
25.0 – 29.9 Overweight
30.0 and Above Obese

R Code and Example (Using Formula 1)

BMI <- function(w,h){round(w / (h)^2,1)}
weightstatus <- function(w, h) { BMI <- round(w / (h)^2,2)
        if ( BMI < 18.50) {wstatus <- 'Underweight'}
        else if ( BMI < 25.00 ) {wstatus <- 'Normal'}
        else if ( BMI < 30.00) {wstatus <- 'Overweight'}
        else {wstatus <- 'Obese'}
        return(wstatus) }
#Example: Weight = 68 kg, Height = 1.65 m;
BMI(68,1.65);weightstatus(68, 1.65) 

[1] 25

[1] "Normal"