PURPOSE The purpose of this cross-sectional evaluation was to determine the associations between raw bioelectrical impedance and cardiometabolic health parameters in a sample of young non-Hispanic White and African American adults. METHODS A total of 96 (female: 52, male: 44) non-Hispanic White ( n = 45) and African American adults ( n = 51) between the ages of 19 and 37 yr (22.7 ± 3.83 yr) completed several fasted assessments including resting systolic blood pressure (rSBP), blood glucose (FBG), blood lipids, and bioelectrical impedance spectroscopy. Bioelectrical impedance spectroscopy-derived measurements included phase angle, bioimpedance index (BI), impedance ratio (IR), reactance index (XCi), fat-free mass (FFM), FFM index (FFMi), and absolute (a) and relative (%) total body water (TBW) and extracellular (ECF) and intracellular fluid (ICF). All bioelectric variables were collected at 50 kHz other than IR (250 kHz/5 kHz). Multiple regressions were conducted and adjusted for sex, age, and body mass index. RESULTS rSBP was positively, and HDL was inversely, associated with all bioelectrical impedance and absolute hydration variables (all P ≤ 0.050) other than XCi for rSBP and XCi and FFMi for HDL. rSBP ( P < 0.001) was inversely, and HDL ( P = 0.034) was positively, associated with IR. FBG was positively associated with BI, XCi, FFM, TBWa, and ECFa (all P < 0.050). Metabolic syndrome severity was positively associated with BI, FFM, TBWa, and ECFa for women (all P ≤ 0.050) and with ICFa for African American women ( P = 0.016). CONCLUSIONS Given the rapid increase in the prevalence of cardiometabolic health risks among young adults and the broad use of bioelectrical impedance in practice, the conflicting associations we observed in this age group suggest that bioelectrical impedance parameters should be used with caution in the context of cardiometabolic health risks and age.

中文翻译：

---

年轻白人和黑人成年人生物电阻抗与心脏代谢健康参数之间的相互冲突的关联。


目的本次横断面评估的目的是确定年轻非西班牙裔白人和非裔美国成年人样本中原始生物电阻抗与心脏代谢健康参数之间的关联。方法 共有 96 名年龄在 19 岁至 37 岁（22.7 ± 3.83 岁）之间的非西班牙裔白人 (n = 45) 和非洲裔美国成年人 (n = 51) 完成了多项禁食评估。包括静息收缩压（rSBP）、血糖（FBG）、血脂和生物电阻抗光谱。生物电阻抗光谱衍生的测量包括相位角、生物阻抗指数 (BI)、阻抗比 (IR)、电抗指数 (XCi)、去脂质量 (FFM)、FFM 指数 (FFMi) 以及绝对 (a) 和相对 (a) %) 体内水分总量 (TBW) 以及细胞外液 (ECF) 和细胞内液 (ICF)。除 IR (250 kHz/5 kHz) 外，所有生物电变量均在 50 kHz 下收集。对性别、年龄和体重指数进行多元回归和调整。结果 rSBP 呈正相关，HDL 呈负相关，与除 rSBP 的 XCi 以及 HDL 的 XCi 和 FFMi 之外的所有生物电阻抗和绝对水合变量（所有 P ≤ 0.050）相关。 rSBP ( P < 0.001) 与 IR 呈负相关，HDL ( P = 0.034) 呈正相关。 FBG 与 BI、XCi、FFM、TBWa 和 ECFa 呈正相关（均 P < 0.050）。女性代谢综合征严重程度与 BI、FFM、TBWa 和 ECFa 呈正相关（所有 P ≤ 0.050），而非洲裔美国女性则与 ICFa 呈正相关（P = 0.016）。 结论 鉴于年轻人心脏代谢健康风险的患病率迅速增加以及生物电阻抗在实践中的广泛使用，我们在该年龄组中观察到的相互矛盾的关联表明，在心脏代谢健康的背景下应谨慎使用生物电阻抗参数风险和年龄。