title: Comparison of Bioelectrical Impedance Analysis and Air Displacement Plethysmography in Community-Dwelling Older Adults.
abstract: Clinicians and researchers use body composition measurements to identify individuals who may be at risk of adverse health complications. This study compared two commonly used two-compartmental anthropometric models (bioelectrical impedance analysis [BIA] and air displacement plethysmography [ADP]) to determine whether these two cost-effective methods would provide similar fat free mass index (FFMI) values in a mixed and sex-separated sample population of healthy older adults. Community-dwelling older adults (N= 37, 18 men) aged 74.5 ± 5.2 years participated. FFMIBIAwas correlated with FFMIADP(r= .916); however, these correlations were markedly reduced when the population was split by sex (r< .60). The level of agreement between the difference values (FFMIBIA- FFMIADP) fluctuated ± 2.1 kg/m(2)(illustrated via Bland-Altman plots), but these differences were not statistically different from 0. Findings from the current work suggest that clinicians must be cautious when using portable devices such as BIA to assess FFMI in an older adult population.
authors.affiliation: University of Guelph, Ontario, Canada.
authors.forename: K Brent
authors.initials: KB
authors.lastname: Smale
authors.affiliation: University of Guelph, Ontario, Canada.
authors.forename: Emily I
authors.initials: EI
authors.lastname: McIntosh
authors.affiliation: University of Guelph, Ontario, Canada lvallis@uoguelph.ca.
authors.forename: Lori Ann
authors.initials: LA
authors.lastname: Vallis
mesh_terms: D000273:Adipose Tissue; D050154:Adiposity; D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D017097:Electric Impedance; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D009864:Ontario; D010991:Plethysmography
keywords: air displacement plethysmography; bioelectrical impedance analysis; body circumference; fat free mass index; older adults