Table 1 Groups and impedance parameters studied in this paper

ANS

Children with active NS (n = 8)

NSR

Children from ANS group re-studied at time of NS remission (n = 5)

ANS*

Subgroup of ANS, same children as NSR group (n = 5)

HC

Healthy controls, age-matched to ANS group (n = 38)

H

Patient height (m)

f _c

The characteristic frequency (kHz)

R

Resistance (Ohm, Ω)

X_C

Capacitive reactance (Ω)

PA₅₀

Phase angle (in degrees) calculated at a frequency of 50 kHz

PA_fc

PA calculated at f_c

BIVA_RXc

Bioelectrical impedance vector analysis plot based on R/H and X_C/H (unit Ω/m)

BIVA_Zs

BIVA plots based on Z scores (no unit)

IR_200/5

Impedance ratio (no unit) calculated at the frequencies 200 and 5 kHz

IR_fc/5

IR calculated at the frequencies f_c and 5 kHz.