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Relationship between body fat and BMI in a US hispanic population‐based cohort study: Results from HCHS/SOL
Author(s) -
Wong William W.,
Strizich Garrett,
Heo Moonseong,
Heymsfield Steven B.,
Himes John H.,
Rock Cheryl L.,
Gellman Marc D.,
SiegaRiz Anna Maria,
SotresAlvarez Daniela,
Davis Sonia M.,
Arredondo Elva M.,
Van Horn Linda,
WylieRosett Judith,
SanchezJohnsen Lisa,
Kaplan Robert C.,
MossavarRahmani Yasmin
Publication year - 2016
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.21495
Subject(s) - bioelectrical impedance analysis , medicine , body mass index , demography , obesity , population , gerontology , linear regression , cohort , environmental health , machine learning , sociology , computer science
Objective To evaluate the percentage of body fat (%BF)‐BMI relationship, identify %BF levels corresponding to adult BMI cut points, and examine %BF‐BMI agreement in a diverse Hispanic/Latino population. Methods %BF by bioelectrical impedance analysis was corrected against %BF by 18 O dilution in 434 participants of the ancillary Hispanic Community Health Study/Study of Latinos. Corrected %BF was regressed against 1/BMI in the parent study ( n = 15,261), fitting models for each age group, by sex, and Hispanic/Latino background; predicted %BF was then computed for each BMI cut point. Results Bioelectrical impedance analysis underestimated %BF by 8.7 ± 0.3% in women and 4.6 ± 0.3% in men ( P < 0.0001). The %BF‐BMI relationship was nonlinear and linear for 1/BMI. Sex‐ and age‐specific regression parameters between %BF and 1/BMI were consistent across Hispanic/Latino backgrounds ( P > 0.05). The precision of the %BF‐1/BMI association weakened with increasing age in men but not women. The proportion of participants classified as nonobese by BMI but as having obesity by %BF was generally higher among women and older adults (16.4% in women vs. 12.0% in men aged 50‐74 years). Conclusions %BF was linearly related to 1/BMI with consistent relationship across Hispanic/Latino backgrounds. BMI cut points consistently underestimated the proportion of Hispanics/Latinos with excess adiposity.