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Table 6 Bioelectrical impedance analysis results for COVID-19 patients in ICU

From: Nonthyroidal illness syndrome (NTIS) in severe COVID-19 patients: role of T3 on the Na/K pump gene expression and on hydroelectrolytic equilibrium

COVID-19 patients (n. 74) Rz (W) Xc (W) TBW (%) ECW (%) ICW (%) Nae:Ke (ratio) PhA (°)
Normal FT3 serum levels > 1.7 pg/ml (n. 32) 453.6 ± 123.8 31.6 ± 14.5 55.7 ± 10.7 59.2 ± 13.1 40.9 ± 13.1 1.8 ± 1.2 4.1 ± 1.9
Low FT3 serum levels ± 1.7 pg/ml (n. 42) 382.8 ± 113.5 21.7 ± 14.8* 59.5 ± 7.4* 65.2 ± 14.2* 34.8 ± 14.2* 2.4 ± 1.5* 3.2 ± 2.0
  1. Rz: resistance; Xc: reactance; TBW: total body water; ECW: extracellular water; ICW: intracellular water; Nae:Ke: sodium/potassium exchangeable ratio; PhA: 50 kHz Whole Body Phase Angle
  2. *p < 0.05