Oct 24, What is a person's ideal weight, and how do height, age, and other factors affect it ? Find out more It measures a person's weight in relation to their height. According A BMI of between 25 and is overweight. A BMI over. May 14, HWDI was calculated as the difference between height and weight. . Figure 1 shows the relationship between average BMI and age. We examined the weight-height relationship in 25 diverse population samples The analysis included 72 subgroups with a total of , adults aged 25 years with weight in all studies, a significant, negative correlation between BMI and.
Body mass index BMI was calculated for both self-reported and measured values. Agreement of each self-reported and measured value was assessed visually with a scatterplot on the agreement line and descriptively with Pearson correlation.
How much should I weigh for my height and age?
Comparison of continuous height, weight and BMI measured vs. A Bland-Altman plot is a method of data plotting used to graphically depict and analyze the agreement between two assessments of the same measure. The participants were mostly white The breakdown of BMI categories by measured values was as follows: Currently, there are several widely used methods to assess overweightness and obesity in adults.
However, this method is too expensive for regular use, particularly in a resource limited country such as Thailand, whereas bioelectrical impedance analysis BIA is less expensive and more practical and has been shown to be moderately accurate in comparison to the gold standard method [ 1011 ]. The body mass index BMI is the most common index for assessing weight status and is calculated from weight kg and height m2 [ 12 ].
However, this method requires additional devices for measurement. This may result in an underestimation of the number of individuals in a population with obesity [ 13 ]. To overcome this limitation, the Research Institute for Health Sciences in Thailand came up with a simple index for screening overweightness and obesity called the height-weight difference index HWDI by assessing the difference between height cm and weight kg.
They also found that HWDI was associated with determining obesity prevalence in ages over 18 [ 14 ].
Materials and Methods 2.
Study Population Between and at the Faculty of Medicine, Chiang Mai University, adult Thai volunteers were requested via public information posters and the hospital website. Volunteers aged less than 18 years or pregnant women were excluded. 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.
How much should I weigh for my height and age? BMI calculator and chart, waist-hip ratio
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. This is despite the fact that adult height correlates with joint dimensions and may reflect bone development [ 1415 ]. Therefore, we investigated the relationship between height, weight and BMI on the risk of primary hip and knee joint replacement in a prospective study of middle-aged women.
Subjects and methods Study population The Million Women Study is a population-based prospective cohort study that recruited 1.
The study aims, methods and the characteristics of the study population have been described elsewhere [ 16 ]. Briefly, women were recruited through attendance at breast-screening clinics and were asked to complete a baseline questionnaire, which included questions on socio-demographic, lifestyle and anthropometric factors and medical history.
In —, women who entered the study were sent a follow-up questionnaire to update exposure information and ascertain certain incident morbidity. On the return of the questionnaire, if the respondents had written down an operation, this was manually coded by clinical coders and entered into the study database.
Revision joint replacements were coded separately. We presumed that the accuracy of self-reporting would be similar between participants recruited in England and Scotland.
Participants who had returned a follow-up questionnaire and had their responses entered into a database by 31 December were eligible to be included in these analyses.
All the participants provided written consent to be included in the study and the study protocol has been approved by the English National Health Service Eastern Multi-Centre Research Ethics Committee. Analysis Cases were defined as women who at follow-up reported a hip or knee replacement after recruitment. Women who reported more than one operation were counted once, in the respective analysis, taking the date of their first joint replacement since recruitment.
As we were interested in operations that were performed for osteoarthritis and not resulting from fractures or inflammatory arthritis, we excluded women who reported fractures of the hip or knee tibiofemoral region within the 6 months preceding the date of their respective joint replacement and those who reported a history of rheumatoid arthritis or cancer other than non-melanoma skin cancer at entry to the study.
Relative risks for the relationship between height, weight and BMI on incident hip replacement or knee replacement were calculated using a Cox regression model.