Body Mass Index, BMI Calculator, Healthy BMI
Because muscle tissue burns more calories than fat, a person who has more muscle will While there is a strong correlation between body weight and body fat content, people of Continue Learning about Body Mass Index (BMI) It's a calculation of your weight-to-height ratio and can provide insight into risk for diseases. HWDI was calculated as the difference between height and weight. The body mass index (BMI) is the most common index for assessing weight The impedance is related to the volume of a conductor (the human body) and. The second rationale is that BMI correctly captures the relationship between weight and height, which implies that the slope of log weight regressed on log.
Methods Series of cross-sectional surveys: Health Survey for England, — We study the Benn Index, which is the coefficient in a regression of log weight on log height.
This is adjusted for age, gender and calendar time, allowing for non-linear terms and interactions. The decrease in mean BMI in the tallest compared with the shortest height quartile was 0. Regression analysis of log weight on log height revealed that the inverse association between BMI and height was more pronounced in older adults and stronger in women than in men, with little change over calendar time.
Conclusions Unlike early childhood, where taller children tend to have higher BMI, adults, especially women and older people, show an inverse BMI—height association. BMI is a heterogeneous measure of weight-for-height; height may be an important and complex determinant of BMI trajectory over the life course. As an individual's height and weight can be readily and inexpensively measured, BMI has become a popular heuristic approximation for body fatness in epidemiology and clinical practice.
Much debate has argued that other anthropometric measures, such as waist circumference and waist-to-hip ratio, are better predictors of disease outcome compared with BMI, 1112 though recent meta-analyses suggest that these measures are no more informative than BMI for cardiovascular disease 3 or type 2 diabetes. This may not be true, particularly at earlier points in the life course.
We showed that BMI had been rising more in the taller faster growing 3 year olds than in their shorter peers, suggesting a causal drive to increasing adiposity in young children that involves both growth and appetite. Many studies in the paediatric literature have shown that the value of the Benn Index varies with gestational age 20 and during childhood development.
Why is it important to know my body mass index?
First, we examine the impact of age on the BMI—height relationship between ages 16 and 75 years. Second, recognizing the increasing prevalence of overweight and obesity in England over the past two decades, 24 we explore whether or not the BMI—height relationship has changed over this time period.
Methodologically, we extend to an adult population our analyses of the BMI—height relationship in young children 15 and determine whether this relationship differs by gender, by age group, and over time, and explore for influences of potential confounders, such as smoking and income.
Methods and procedures Data source The Health Survey for England HSE is a series of annual cross-sectional surveys, piloted in and run in full sinceto monitor the health of the English population.
HWDI was calculated as the difference between height cm and weight kg [ 14 ].
For single frequency BIA, two electrodes are generally located on the right ankle and the right wrist of an individual. The impedance is related to the volume of a conductor the human body and the square of the length of the conductor, a distance which is a function of the height of the subject.
Obesity: What is BMI in adults, children, and teens
Before analysis, all participants were asked to observe the following pretest guidelines: Statistical Analysis All of the continuous variable data were reported as medians and IQRs, and the categorical data were reported as numbers and percentages. The Wilcoxon rank-sum test was used to compare differences between characteristics and gender. Age was divided into three groups 18—39 years, 40—60 years, and over 60 years.
Multiple linear regression analysis was first used, followed by an examination of the possibility of a nonlinear relationship existing by including quadratic and cubic forms. All reports of were two-sided and less than 0. Figure 1 shows the relationship between average BMI and age.
It was found that, from the age of 18 to 39 years, the mean BMI increases as age increases but, after reaching 60 years of age, the mean BMI decreases as age increases see Figure 1 a. The reverse can be found for the relationship between mean HWDI and age.
HWDI and body-fat percentage in relation to age and gender. InGallagher et al. In addition, the SEE values derived from this study were similar to, yet higher than, those of some other studies [ 1629 ]. In addition, it is a quick and simple method that does not require a great deal of training to utilize. In the study using the same set of data, Juntaping et al. In this study, the obesity was proportionately higher in women than men, which is in accordance with previous studies which showed a higher risk of obesity in women both globally and in Asia [ 133132 ].
Normal weight ranges: Body mass index (BMI)
This may be due to differences in eating and exercising behaviors from men, as well as physical attributes, hormones, and metabolism [ 33 — 35 ].
It is evident that New-HWDI compares well with BMI and is likely to classify obesity status with a lower proportion of underestimated values in some age groups. However, obesity screening of the elderly may be less adequate compared to younger people because the former may have less muscle but more body fat, and they may have osteoporosis, which is often found in inhabitants of low or middle-low income countries, especially in women [ 3637 ]. This supports our findings that HWDI could be used as a way to deal with the limitations of BMI in identifying obesity in intermediate ranges.
This has resulted in an easier means to evaluate obesity, thus aiding the monitoring of high-risk groups in the population so as to avoid problems associated with it.
Consent All participants provided written informed consent prior to participation in this study.