Bioelectrical impedance analysis: population reference values for phase angle by age and sex

被引:447
作者
Barbosa-Silva, MCG
Barros, AJ
Wang, J
Heymsfield, SB
Pierson, RN
机构
[1] Univ Fed Pelotas, Programa Pos Grad Epidemiol, Pelotas, RS, Brazil
[2] Columbia Univ, St Lukes Roosevelt Hosp Ctr, Obes Res Ctr, New York, NY USA
关键词
bioelectrical impedance analysis; phase angle; nutritional assessment; body composition; diagnostic methods;
D O I
10.1093/ajcn/82.1.49
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Background: Phase angle is an indicator based on reactance and resistance obtained from bioelectrical impedance analysis (BIA). Although its biological meaning is still not clear, phase angle appears to have an important prognostic role. Design: BIA and other methods used to evaluate body composition, including hydrodensitometry and total body water, were completed in 1967 healthy adults aged 18-94 y. Phase angle was calculated directly from body resistance and reactance, and fat mass (FM) was estimated from the combination of weight, hydrodensitometry, and total body water by using the 3-compartment Siri equation. Phase angle values were compared across categories of sex, age, body mass index (BMI), and percentage FM. Results: Phase angle was significantly (P < 0.001) smaller in women than in men and was lower with greater age (P < 0.001). Phase angle increased with an increase in BMI and was significantly inversely associated with percentage fat in men. Phase angle was significantly predicted from sex, age, BMI, and percentage FM in multiple regression models. Conclusions: Phase angle Conclusions: Phase angle differs across categories of sex, age, BMI, and percentage fat. These reference values can serve as a basis for phase angle evaluations in the clinical setting.
引用
收藏
页码:49 / 52
页数:4
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