Biomaterial Database

[Prediction formulas for estimating body fat percent of obesity from bioelectrical impedance]. 2003

Jingzhong Wang, and Xiaogui Wang

Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing 100050, China.

The bioelectrical impedance method has become a popular and widely used method to determine body composition. In this study, body fat was measured by densitometry in a group of 66 males and 130 females obesity Chinese, aged 18 to 67 years. Body weight, body height were measured as well as total body bioelectrical impedance at 50 kHz. BMI and BF% was (27.7 +/- 3.1) kg/m2 and (38.81 +/- 6.27)% respectively (mean +/- SD). The prediction formulas for body fat from bioelectrical impedance developed in western societies, are significant underestimate body fat of Chinese obesity from body density. The prediction formulas for body fat with our subjects is; BF = 0.846 * Wt - 0.185 * Ht2/Z - 2.361 * Sex - 24.977. (r = 0.923, SEE = 3.43, F = 365.7, P < 0.001). Wt: body weight; Ht: body height; Sex; male = 1, female = 0; Z: bioelectrical impedance.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009765	Obesity	A status with BODY WEIGHT that is grossly above the recommended standards, usually due to accumulation of excess FATS in the body. The standards may vary with age, sex, genetic or cultural background. In the BODY MASS INDEX, a BMI greater than 30.0 kg/m2 is considered obese, and a BMI greater than 40.0 kg/m2 is considered morbidly obese (MORBID OBESITY).
D011237	Predictive Value of Tests	In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.	Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D001823	Body Composition	The relative amounts of various components in the body, such as percentage of body fat.	Body Compositions,Composition, Body,Compositions, Body
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000273	Adipose Tissue	Specialized connective tissue composed of fat cells (ADIPOCYTES). It is the site of stored FATS, usually in the form of TRIGLYCERIDES. In mammals, there are two types of adipose tissue, the WHITE FAT and the BROWN FAT. Their relative distributions vary in different species with most adipose tissue being white.	Fatty Tissue,Body Fat,Fat Pad,Fat Pads,Pad, Fat,Pads, Fat,Tissue, Adipose,Tissue, Fatty
D000293	Adolescent	A person 13 to 18 years of age.	Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults