A novel method for diaphragm-based electrode belt position of electrical impedance tomography by ultrasound

Table 4 Comparison between agreed and disagreed groups

Parameters	Agreed group (n = 23)	Disagreed group (n = 27)	P-value
Age (yrs)	55 ± 14	62 ± 14	0.085
Heart rate (bpm)	81 ± 16	89 ± 14	0.09
MAP (mmHg)	94 ± 14	90 ± 14	0.330
APACHE-II	12 ± 5	14 ± 6	0.266
BMI	23 ± 2	26 ± 3	0.002*
PEEP (cmH₂O)	5.5 ± 1	5.4 ± 1	0.955
Oxygenation index	334 ± 135	294 ± 115	0.231
Tidal volume (ml)	467 ± 98	423 ± 73	0.092
Glob-TV_{Diaphragm-based EIT-belt plane} (AU)	3298 ± 1139	2898 ± 1059^†	0.263
Glob-TV_{5th ICS plane} (AU)	3214 ± 1120	2246 ± 968	0.005*
TV/VT ratio _{Diaphragm-based EIT-belt plane}	7.3 ± 2.9	7.1 ± 2.9^†	0.884
TV/VT ratio _{5th ICS plane}	7.1 ± 2.9	5.5 ± 2.7	0.04*

PEEP positive end-expiratory pressure, TV/VT tidal impedance variance/tidal volume, BMI body mass index, AU arbitrary unit
^*Agreed group vs. disagreed group, P < 0.05
^†Diaphragm-based EIT-belt plane vs. 5th ICS plane, P < 0.05

ISSN: 2052-0492