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Body fat and fat‐free mass normalization by height
Author(s) -
Rodríguez Patricia,
Bermúdez Enrique,
Macri Elisa,
Ponce Graciela,
Gamba Carlota,
Juiz Natalia,
Zeni Susana,
Exeni Ramón,
Friedman Silvia
Publication year - 2009
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.23.1_supplement.914.2
Subject(s) - anthropometry , fat mass , medicine , linear regression , fat free mass , body mass index , normalization (sociology) , mass index , demography , zoology , statistics , mathematics , biology , sociology , anthropology
Measurement of children's body composition has become increasingly common. However, attention has been focused on methods, and less on the way in which data is expressed. Objective to study the relationship between height (Ht) with fat mass (FM) and fat‐free mass (FFM), measured by DXA in preschool children; and calculate an independent index (FMI and FFMI) of Ht. Seventy five children (males= 31, females= 44) aged 3 to 5, from La Matanza, Province of Buenos Aires, Argentina, attending a day care center, were included. There were healthy according to anthropometric (WHO, 1999) and clinical evaluation. Ht data were collected and FM and FFM were measured using a Lunar DPX‐L, pediatric software. Pearson's correlation was used to examine the association between FM, FFM, FMI and FFMI with Ht, and linear regression to determine what power of height (Ht y ) results in a zero correlation between body composition and Ht. Results FM and FFM are associated with Ht (p=0.0222 and p< 0.0001, respectively) without differences between sexes. The slope of the regression line relating lgFM to lgHt was 1.49, while that for lgFFM to lgHt was 2.12. Thus, FM/Ht and FFM/Ht 2 are uncorrelated with Ht (p=0.4063 and p=0.3695, respectively). Conclusion to compare children's body composition, normalization for body size is required. The indices FMI (FM/Ht) and FFMI (FFM/Ht 2 ) would be appropriate for this purpose. Awarded by UBACyT O‐008 and 015.