| AC | Alternating current |
| BIA | Bioelectrical impedance analysis |
| BIS | Bioimpedance spectroscopy |
| Cm | Cell membrane capacitance |
| CPE | Constant phase element |
| ICW | Intracellular water |
| MF-BIA | Multi-frequency bioelectrical impedance analysis |
| PhA | Phase angle |
| RE | Resistance of the extracellular water |
| RI | Resistance of the intracellular water |
| RINF (R∞) | Resistance at infinite frequency (f = ∞) |
| R0 (RE) | Resistance at zero frequency (f = 0) |
| SF-BIA | Single-frequency bioelectrical impedance analysis |
| TBW | Total body water |
| XC | Capacitive reactance |
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