Chapter 22, Problem 24E

Summary Introduction

To explain: The reason why the probability of death as a function of the body mass index is a U-shaped curve.

Concept introduction: The body mass index is the measure of the body fat based on the height and weight that applies to adult men and women. A body mass index between 18.5 and 25 is ideal. The body mass index between 25 and 30 is classified as overweight. The person with a BMI more than 30 is called obese. The BMI below 18 is classified as underweight person.

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Pictorial representation: Fig.1 represents the “U” shaped curve of probability of death as a function of the body mass index.

Fig. 1: “U” shaped curve of probability of death as a function of the body mass index.

Explanation:

The relationship between the all-cause mortality and body mass index in man is a U-shaped curve. The body mass index categorizes the people in overweight, normal weight, and underweight. The severely underweight individuals are at the risk of dying from the malnutrition-related causes. The individuals having 40% overweight have more chances of premature death when compared to a person with average weight. This is because obesity is linked to several serious medical conditions including diabetes and atherosclerosis. The individuals who belong to severely underweight categories and severely overweight categories are more likely to die from various reasons than the individuals who belong to normal category.