P-808: Relationship between BMI and fat mass among seniors and super- seniors

摘要

Background: Body mass index (BMI), fat mass and fluids volume change while we age. BMI underestimates the problems associated with overweight and obesity in the elderly. Thus the aim of the study was to evaluate relationship between BMI and adipose tissue content and fluids volume in seniors and super-seniors. Methods: 200 seniors (65-87 years old) were divided as seniors "S" (65-69.9 years old; n = 129) and super-seniors "SS" (70 years old and above; n = 51). Inclusion and exclusion criteria were defined. Anthropometric measurements was performed and body composition analysis were determined by Bioelectrical Impedance Analysis using the Tanita MC-780 Body Composition Analyzer. Moreover seniors were divided by BMI as those with overweight "W" (BMI 25.0-29.9 kg/m~2; n = 117) and obesity "O" (BMI > 30 kg/m~2; n = 63). Results: S with overweight had fat mass 33.2 ± 5.2[%] and fluids volumes 46.6 ± 4.0 [%]); S with obesity had fat mass 40.8 ± 5.9 [%] and fluids volumes 42.0 ± 4.3 [%]; SS with overweight fat mass 33.6 ± 4.4 [%] and fluids volumes 46.6 ± 3.1 [%]); SS with obesity had fat mass 39.8 ± 7.2[%] and fluids volumes 43.4 ± 4.7 [%]). Contrary to expectation, this study found only a positive relationship between fat mass and BMI in seniors with obesity (p > 0.05, r = 0.33). We did not observe any correlations for BMI with fluids volumes and fat mass among super-seniors. Conclusions: Seniors with obesity had coexisting elevated fat mass. We did not observe relationship between BMI and fat mass in super-seniors. These findings can help make the therapeutic decision for elderly persons due to BMI.