title: Is percentage body fat differentially related to body mass index in Hispanic Americans, African Americans, and European Americans?
abstract: BACKGROUND
  Limited research has been done to explore differences between ethnic groups, including Hispanic Americans (HAs), in the association between percentage body fat (PBF) and body mass index (BMI; in kg/m(2)); the numbers of HAs are increasing in the US population.
  
  
  OBJECTIVE
  We investigated whether the relation between PBF and BMI in adult HAs differed from that of African Americans (AAs) and European Americans (EAs).
  
  
  METHODS
  We used a multiple regression model in which PBF measured with dual energy X-ray absorptiometry was predicted by the reciprocal of BMI (1/BMI; in m(2)/kg) in a sample of 487 men (n(EA) = 192, n(AA) = 148, and n(HA) = 147) and 933 women (n(EA) = 448, n(AA) = 304, and n(HA) = 181).
  
  
  RESULTS
  For men, our results showed no significant differences between HAs and EAs, AAs and EAs, or HAs and AAs in the slope of the line relating 1/BMI to PBF. In women, there were significant differences in PBF as predicted by BMI between HAs and EAs (P < 0.002) and AAs and HAs (P = 0.020), but not between AAs and EAs. When PBF was estimated on the basis of predicting equations, the trend of the predicted PBF value in women differed according to ethnic group and BMI category. At a BMI < 30, HAs tended to have more body fat than did EAs and AAs, and at a BMI > 35, EAs tended to have more body fat than did the other groups.
  
  
  CONCLUSIONS
  Our results show that the relation between PBF and BMI in HA women differs from that of EA and AA women.
authors.affiliation: Obesity Research Center, St Luke's-Roosevelt Hospital and the Institute of Human Nutrition, Columbia University College of Physicians and Surgeons, New York, USA. fernandj@shrp.uab.edu
authors.forename: José R
authors.initials: JR
authors.lastname: Fernández
authors.forename: Moonseong
authors.initials: M
authors.lastname: Heo
authors.forename: Steven B
authors.initials: SB
authors.lastname: Heymsfield
authors.forename: Richard N
authors.initials: RN
authors.lastname: Pierson
authors.forename: F Xavier
authors.initials: FX
authors.lastname: Pi-Sunyer
authors.forename: Zimian M
authors.initials: ZM
authors.lastname: Wang
authors.forename: Jack
authors.initials: J
authors.lastname: Wang
authors.forename: Matthew
authors.initials: M
authors.lastname: Hayes
authors.forename: David B
authors.initials: DB
authors.lastname: Allison
authors.forename: Dympna
authors.initials: D
authors.lastname: Gallagher
mesh_terms: D015502:Absorptiometry, Photon; D000273:Adipose Tissue; D000328:Adult; D044383:Black People; D015992:Body Mass Index; D005060:Europe / Q000208:ethnology; D005260:Female; D006630:Hispanic or Latino; D006801:Humans; D008297:Male; D008875:Middle Aged; D017678:Sex Distribution; D014481:United States; D001741:Black or African American