相关实验视频
Updated: Jul 14, 2025

09:36
Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
27.1K
使用特定性别的体重指数来优化与身高的低相关性和与肥胖的高相关性:英国生物银行研究
American journal of epidemiology
|October 10, 2023
概括
研究人员探索了特定性别的体重指数 (BMI) 公式. 传统的BMI仍然对研究和男性和女性的疾病查有价值.
科学领域:
- 人类健康 人类健康 人类健康
- 生物识别信息 生物识别信息
- 流行病学 流行病学
背景情况:
- 体重指数 (BMI) 是一般脂肪的标准衡量标准.
- 人们对目前的BMI公式对男性和女性的普遍适用性存在担忧.
- 调查BMI计算的性别特定调整对于准确的健康评估至关重要.
研究的目的:
- 为了确定BMI公式中高度的最佳性别特异指数.
- 为了提高BMI的独立性,从身高和身体脂肪的依赖性.
- 评估修改的BMI公式在健康风险预测中的有效性.
主要方法:
- 利用英国生物库数据 (n=489,873) 随机分配到培训和测试集.
- 分析了从-50.00到50.00的高度指数,以确定最佳值.
- 采用年龄调整的相关性来最小化身高相关性和最大化身体脂肪百分比相关性.
主要成果:
- 确定了最佳身高指数,男性为1.77,女性为1.39.
- 新的公式导致4.5%的女性和2.4%的男性被重新分类到不同的BMI类别.
- 修改后的配方并没有显著改善过度体脂的识别或预测所有原因死亡风险.
结论:
- 传统的BMI公式对于研究和疾病查在两性之间仍然具有重要价值.
- 性别特定的BMI调整,虽然重新分类了一些人,但并没有大大提高健康结果的预测准确性.
- 可能需要进一步的研究来完善超越传统的BMI的脂肪度量.
相关概念视频
Obesity
511
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
511
Hypodermis
4.6K
The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...
4.6K
Signs of Puberty
383
Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
383
Polygenic Traits
66.0K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
66.0K
Variation: Normal Distribution, Range, and Standard Deviation
22.3K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
22.3K
The Ratio of X Chromosome to Autosomes
8.6K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.6K

